ISSN: 0022-1481 |
Published by ASME International
No Issue Number
- A Hybrid Phonon Gas Model for Transient Ballistic-Diffusive Heat Transport
Yanbao Ma<br/> We present a continuum hybrid phonon gas model to describe transient ballistic-diffusive heat transport. In this model, heat energy is carried by a mixture of longitudinal and transverse phonon gases so that the distinction between longitudinal and transverse phonon excitations is taken into account ... [J. Heat Transfer 135, 044501 (2013)] published Wed Feb 20, 2013.
- Structure Controlled Synthesis of Vertically Aligned Carbon Nanotubes Using Thermal Chemical Vapor Deposition Process
Myung Gwan Hahm, Young-Kyun Kwon, Ahmed Busnaina, and Yung Joon Jung<br/> Due to their unique one-dimensional nanostructure along with excellent mechanical, electrical, and optical properties, carbon nanotubes (CNTs) become a promising material for diverse nanotechnology applications. However, large-scale and structure controlled synthesis of CNTs still have many difficul ... [J. Heat Transfer 133, 031001 (2010)] published Mon Nov 15, 2010.
- Special Issue on Advanced Thermal Processing
Wilson K. S. Chiu, Costas P. Grigoropoulos, and Ben Q. Li<br/> Abstract not available. [J. Heat Transfer 133, 030301 (2010)] published Mon Nov 15, 2010.
- Thermal Science of Weld Bead Defects: A Review
P. S. Wei<br/> Mechanisms for the formation of bead defects, such as humping, gouging, rippling, and other unexpected surface patterns, encountered in welding or drilling are interpreted and reviewed from thermal-fluid science viewpoint. These defects usually accompanying with porosity, undercut, segregation, stre ... [J. Heat Transfer 133, 031005 (2010)] published Mon Nov 15, 2010.
- Characteristics of Pool Boiling Bubble Dynamics in Bead Packed Porous Structures
Calvin H. Li, Ting Li, Paul Hodgins, and G. P. Peterson<br/> Spherical glass and copper beads have been used to create bead packed porous structures for an investigation of two-phase heat transfer bubble dynamics under geometric constraints. The results demonstrated a variety of bubble dynamics characteristics under a range of heating conditions. The bubble g ... [J. Heat Transfer 133, 031004 (2010)] published Mon Nov 15, 2010.
- Modeling of Ultrafast Phase Change Processes in a Thin Metal Film Irradiated by Femtosecond Laser Pulse Trains
Jing Huang, Yuwen Zhang, J. K. Chen, and Mo Yang<br/> Ultrashort laser pulses can be generated in the form of a pulse train. In this paper, the ultrafast phase change processes of a 1 [mu]m free-standing gold film irradiated by femtosecond laser pulse trains are simulated numerically. A two-temperature model coupled with interface tracking method is d ... [J. Heat Transfer 133, 031003 (2010)] published Mon Nov 15, 2010.
- Modeling of Ceramic Particle Heating and Melting in a Microwave Plasma
Kaushik Saha, Swetaprovo Chaudhuri, and Baki M. Cetegen<br/> A comprehensive model based on finite volume method was developed to analyze the heat-up and the melting of ceramic particles injected into a microwave excited laminar air plasma flow field. Plasma flow field was simulated as a hot gas flow generated by volumetric heat addition in the microwave coup ... [J. Heat Transfer 133, 031002 (2010)] published Mon Nov 15, 2010.
- Single-Phase Thermal Transport of Nanofluids in a Minichannel
Dong Liu and Leyuan Yu<br/> Nanofluids have been proposed as a promising candidate for advanced heat transfer fluids in a variety of important engineering applications ranging from energy storage and electronics cooling to thermal processing of materials. In spite of the extensive studies in the literature, a consensus is lack ... [J. Heat Transfer 133, 031009 (2010)] published Tue Nov 16, 2010.
- Theoretical Analysis of Microwave Heating of Dielectric Materials Filled in a Rectangular Waveguide With Various Resonator Distances
Phadungsak Rattanadecho and Waraporn Klinbun<br/> This paper proposes mathematical models of the microwave heating process of dielectric materials filled in a rectangular waveguide with a resonator. A microwave system supplies a monochromatic wave in a fundamental mode (TE mode). A convection exchange at the upper surface of the sample is considere ... [J. Heat Transfer 133, 031008 (2010)] published Tue Nov 16, 2010.
- Modeling of the Off-Axis High Power Diode Laser Cladding Process
Shaoyi Wen and Yung C. Shin<br/> Off-axis high power diode laser (HPDL) cladding is commonly used for surface quality enhancement such as coating, part repairing, etc. Although some laser cladding models are available in literature, little has been reported on the modeling of powder flow and molten pool for a rectangular beam with ... [J. Heat Transfer 133, 031007 (2010)] published Tue Nov 16, 2010.
- The Experimental and Theoretical Evaluation of an Indirect Cooling System for Machining
Jay C. Rozzi, John K. Sanders, and Weibo Chen<br/> Cutting fluids have been used in machining processes for many years to decrease the temperature during machining by spraying the coolant into the machining zone directly on the cutting tool and the part. This has the effect of decreasing the tool temperature, which increases tool life and improves t ... [J. Heat Transfer 133, 031006 (2010)] published Mon Nov 15, 2010.
- Titania Nanotubes: Novel Nanostructures for Improved Osseointegration
Nathan Swami, Zhanwu Cui, and Lakshmi S. Nair<br/> Nanostructured one dimensional titanium oxides such as nanotubes and nanowires have raised interest lately due to their unique electronic and optical properties. These materials also have shown significant potential as biomaterials because of their ability to modulate protein and cellular interactio ... [J. Heat Transfer 133, 034002 (2010)] published Tue Nov 16, 2010.
- Thermal Processing of Tissue Engineering Scaffolds
Alisa Morss Clyne<br/> Tissue engineering requires complex three-dimensional scaffolds that mimic natural extracellular matrix function. A wide variety of techniques have been developed to create both fibrous and porous scaffolds out of polymers, ceramics, metals, and composite materials. Existing techniques include fiber ... [J. Heat Transfer 133, 034001 (2010)] published Tue Nov 16, 2010.
- Modeling Transport in Porous Media With Phase Change: Applications to Food Processing
Amit Halder, Ashish Dhall, and Ashim K. Datta<br/> Fundamental, physics-based modeling of complex food processes is still in the developmental stages. This lack of development can be attributed to complexities in both the material and transport processes. Society has a critical need for automating food processes (both in industry and at home) while ... [J. Heat Transfer 133, 031010 (2010)] published Tue Nov 16, 2010.
- Review of Heat Conduction in Nanofluids
Jing Fan and Liqiu Wang<br/> Nanofluidsfluid suspensions of nanometer-sized particlesare a very important area of emerging technology and are playing an increasingly important role in the continuing advances of nanotechnology and biotechnology worldwide. They have enormously exciting potential applications and may revolutionize ... [J. Heat Transfer 133, 040801 (2011)] published Mon Jan 10, 2011.
- Thermodynamic Basis of Dual-Phase-Lagging Heat Conduction
Mingtian Xu<br/> The thermal vibration phenomenon occurring in the dual-phase-lagging heat conduction violates the second law of thermodynamics under the local equilibrium assumption. In order to resolve this paradox, two types of the extended irreversible thermodynamics are developed in the present work, which make ... [J. Heat Transfer 133, 041401 (2011)] published Tue Jan 11, 2011.
- Numerical Simulation of Dynamics and Heat Transfer Associated With a Single Bubble in Subcooled Boiling and in the Presence of Noncondensables
Jinfeng Wu and Vijay K. Dhir<br/> During phase change at the bubble-liquid interface, under subcooled boiling conditions, noncondensable gases dissolved in the liquid will be injected into the bubble along with vapor. Due to heat transfer into subcooled liquid, vapor will condense in the upper regions of the bubble while noncondensa ... [J. Heat Transfer 133, 041502 (2011)] published Mon Jan 10, 2011.
- Scaling of Natural Convection of an Inclined Flat Plate: Sudden Cooling Condition
Suvash C. Saha, John C. Patterson, and Chengwang Lei<br/> The natural convection boundary layer adjacent to an inclined plate subject to sudden cooling boundary condition has been studied. It is found that the cold boundary layer adjacent to the plate is potentially unstable to RayleighBenard instability if the Rayleigh number exceeds a certain critical va ... [J. Heat Transfer 133, 041503 (2011)] published Tue Jan 11, 2011.
- Correlation of Subatmospheric Pressure, Saturated, Pool Boiling of Water on a Structured-Porous Surface
Sean J. Penley and R. A. Wirtz<br/> Saturated pool-boiling experiments at 1 atm and subatmospheric pressure assess the utility of fine-filament screen-laminate enhanced surfaces as effective bubble nucleation sites. Experiments were conducted on vertically oriented, multilayer laminates in saturated distilled water at pressures of 0.2 ... [J. Heat Transfer 133, 041501 (2011)] published Thu Jan 6, 2011.
- Intraparticle Mass Transfer in Adsorption Heat Pumps: Limitations of the Linear Driving Force Approximation
Alexander Raymond and Srinivas Garimella<br/> Adsorption heat pumps and chillers (ADHPCs) can utilize solar or waste heat to provide space conditioning, process heating or cooling, or energy storage. In these devices, intraparticle diffusion is shown to present a significant mass transfer resistance compared with interparticle permeation. There ... [J. Heat Transfer 133, 042001 (2011)] published Thu Jan 6, 2011.
- Heat Transfer From Freely Suspended Bimaterial Microcantilevers
Arvind Narayanaswamy and Ning Gu<br/> Bimaterial atomic force microscope cantilevers have been used extensively over the last 15 years as physical, chemical, and biological sensors. As a thermal sensor, the static deflection of bimaterial cantilevers, due to the mismatch of the coefficient of thermal expansion between the two materials, ... [J. Heat Transfer 133, 042401 (2011)] published Thu Jan 6, 2011.
- Resonance of Natural Convection Inside a Bidisperse Porous Medium Enclosure
Arunn Narasimhan and B. V. K. Reddy<br/> An enclosure filled with blocks made of a microscale porous medium, separated by macrosize pores, can be treated as a bidisperse porous medium (BDPM) enclosure. This study investigates natural convection resonance inside such a BDPM enclosure subjected to time-periodic heat flux at a side wall, with ... [J. Heat Transfer 133, 042601 (2011)] published Thu Jan 6, 2011.
- Efficiency Comparison Between Circular and Semicircular Fins Circumscribing Circular Pipes
R. Chakraborty and A. Sirkar<br/> A new design of fin has been conceived, which is in the shape of a semicircular strip. A step-by-step straightforward detailed derivation of the governing equations for two-dimensional temperature distribution in a semicircular fin has been presented, assuming a third degree polynomial. Numerical re ... [J. Heat Transfer 133, 044501 (2011)] published Thu Jan 6, 2011.
- Erratum: Therporaoustic Convection: Modeling and Analysis of Flow, Thermal, and Energy Fields [Journal of Heat Transfer, 2009, 131(10), p. 101011]
Shohel Mahmud and Roydon Andrew Fraser<br/> Abstract not available. [J. Heat Transfer 133, 047001 (2011)] published Thu Jan 6, 2011.
- A New Technique to Determine Convection Coefficients With Flow Through Particle Beds
Xiaodong Nie, Richard Evitts, Robert Besant, and John Bolster<br/> A new method for determining the heat transfer coefficient for air flowing steadily through beds of particles is presented. In this technique, a step change in the inlet air temperature is applied to a small test bed and temperature distributions in the bed and at the air outlet are sampled over a s ... [J. Heat Transfer 133, 041601 (2011)] published Tue Jan 11, 2011.
- An Improved Volume of Fluid Method for Two-Phase Flow Computations on Collocated Grid System
Dong-Liang Sun, Yong-Ping Yang, Jin-Liang Xu, and Wen-Quan Tao<br/> An improved volume of fluid method called the accurate density and viscosity volume of fluid (ADV-VOF) method is proposed to solve two-phase flow problems. The method has the following features: (1) All operations are performed on a collocated grid system. (2) The piecewise linear interface calculat ... [J. Heat Transfer 133, 041901 (2011)] published Tue Jan 11, 2011.
- Heat Transfer Enhancement Using Laminar Gas-Liquid Segmented Plug Flows
Y. S. Muzychka, E. J. Walsh, and P. Walsh<br/> Heat transfer enhancement using segmented nonboiling gas-liquid flow is examined. Segmentation results in a two phase flow of liquid/gas having a constant liquid fraction; i.e., no phase change occurs. In this flow configuration, enhanced heat transfer occurs as a result of a shorter effective therm ... [J. Heat Transfer 133, 041902 (2011)] published Tue Jan 11, 2011.
- Phonon Transport Across Mesoscopic Constrictions
Dhruv Singh, Jayathi Y. Murthy, and Timothy S. Fisher<br/> Phonon transport across constrictions formed by a nanowire or a nanoparticle on a substrate is studied by a numerical solution of the gray Boltzmann transport equation (BTE) resolving the effects of two length scales that govern problems of practical importance. Predictions of total thermal resistan ... [J. Heat Transfer 133, 042402 (2011)] published Tue Jan 11, 2011.
- Global Spectral Methods in Gas Radiation: The Exact Limit of the SLW Model and Its Relationship to the ADF and FSK Methods
V. P. Solovjov and B. W. Webb<br/> The exact form of the spectral line weighted-sum-of-gray-gases (SLW) model is developed as a limiting case of the classical SLW method when the number of gray gases in the classical model approaches infinity. Solutions of the exact SLW radiative transfer equation are obtained in the case of isotherm ... [J. Heat Transfer 133, 042701 (2011)] published Mon Jan 10, 2011.
- Improved Discrete Ordinates Method for Ray Effects Mitigation
Zhi-Feng Huang, Huai-Chun Zhou, and Pei-feng Hsu<br/> A new and improved method based on the concept of discrete ordinates scheme with infinitely small weights (DOS+ISW) is developed for modeling radiative heat transfer in three-dimensional participating media. To demonstrate the effectiveness of the method in mitigating ray effects, the ray effects ca ... [J. Heat Transfer 133, 044502 (2011)] published Mon Jan 10, 2011.
- Heat Transfer Properties and Energy-Exergy Efficiency in a Finned Cross-Flow Heat Recovery Unit
Isak Kotcioglu and Ahmet Cansiz<br/> In this study, a cross-flow heat recovery-exchanger system operating with unmixed fluids was manufactured and tested. The thermodynamic analysis of the system was presented via determining the variations of exergy loss with Reynolds number. The analysis also included the effects of convergent and di ... [J. Heat Transfer 133, 044503 (2011)] published Thu Jan 13, 2011.
- Numerical Inversion of Laplace Transform for Time Resolved Thermal Characterization Experiment
J. Toutain, J.-L. Battaglia, C. Pradere, J. Pailhes, A. Kusiak, and W. Aregba<br/> The aim of this technical brief is to test numerical inverse Laplace transform methods with application in the framework of the thermal characterization experiment. The objective is to find the most reliable technique in the case of a time resolved experiment based on a thermal disturbance in the fo ... [J. Heat Transfer 133, 044504 (2011)] published Thu Jan 13, 2011.
- Enhancement and Prediction of Heat Transfer Rate in Turbulent Flow Through Tube With Perforated Twisted Tape Inserts: A New Correlation
J. U. Ahamed, M. A. Wazed, S. Ahmed, Y. Nukman, T. M. Y. S. Tuan Ya, and M. A. R. Sarkar<br/> An experimental investigation has been carried out for turbulent flow in a tube with perforated twisted tape inserts. The mild steel twisted tape inserts with circular holes of different diameters (i.e., perforation) are used in the flow field. An intensive laboratory study is conducted for heat tra ... [J. Heat Transfer 133, 041903 (2011)] published Fri Jan 14, 2011.
- Re-examining Electron-Fermi Relaxation in Gold Films With a Nonlinear Thermoreflectance Model
Patrick E. Hopkins, Leslie M. Phinney, and Justin R. Serrano<br/> In this work, we examine Fermi relaxation in 20 nm Au films with pump-probe themoreflectance using a thin film, intraband thermoreflectance model. Our results indicate that the Fermi relaxation of a perturbed electron system occurs approximately 1.100.05 ps after absorption of a 785 nm, 185 fs lase ... [J. Heat Transfer 133, 044505 (2011)] published Fri Jan 14, 2011.
- Measurement of Time-Averaged Turbulent Free Convection in a Tall Enclosure Using Interferometry
M. E. Poulad, D. Naylor, and P. H. Oosthuizen<br/> Laser interferometry is combined with high-speed digital cinematography to measure time-averaged transient and turbulent convective heat transfer rates. The method is applied to study free convection in a tall vertical air-filled enclosure. Measurements are made at three wall spacings in the turbule ... [J. Heat Transfer 133, 042501 (2011)] published Wed Jan 19, 2011.
- Effects of Film Evaporation and Condensation on Oscillatory Flow and Heat Transfer in an Oscillating Heat Pipe
Wei Shao and Yuwen Zhang<br/> An advanced theoretical model of a U-shaped minichannel, a building block of a closed-end oscillating heat pipe, has been developed. Thin film evaporation in the evaporator and thin film condensation in the condenser, axial variation of surface temperature, and pressure loss at the bend are incorpor ... [J. Heat Transfer 133, 042901 (2011)] published Wed Jan 19, 2011.
- Forced Convection in a Polygonal Duct With a Circular Core
C. Y. Wang<br/> The H1 forced convection through a regular polygonal duct with a centered core is studied using eigenfunction expansions and point match. Accurate Nusselt numbers for the full range of core radii are presented. ... [J. Heat Transfer 133, 044506 (2011)] published Wed Jan 19, 2011.
- Forced Convection Boundary Layer Flow Past Nonisothermal Thin Needles in Nanofluids
T. Grosan and I. Pop<br/> The classical problem of forced convection boundary layer flow and heat transfer past a needle with variable wall temperature using nanofluids is theoretically studied. The similarity equations are solved numerically for two types of metallic or nonmetallic, such as copper (Cu) and alumina (AlO) nan ... [J. Heat Transfer 133, 054503 (2011)] published Wed Feb 2, 2011.
- Mineral Fouling Control by Underwater Plasma Discharge in a Heat Exchanger
Yong Yang, Hyoungsup Kim, Alexander Fridman, and Young I. Cho<br/> The excessive mineral contents in water circulation systems could cause severe fouling in heat transfer equipment. The present study investigated the effect of underwater pulsed spark discharges on the mitigation of mineral fouling in a concentric counterflow heat exchanger. Artificial hard water wi ... [J. Heat Transfer 133, 054502 (2011)] published Tue Feb 1, 2011.
- On the Generalized Brinkman Number Definition and Its Importance for Bingham Fluids
P. M. Coelho and J. C. Faria<br/> In this technical note we discuss the importance of using a generalized Brinkman number definition for laminar pipe flow of a Bingham fluid, when viscous dissipation effects are relevant. We show that adapting the Brinkman number definition commonly used for Newtonian fluids directly to the more gen ... [J. Heat Transfer 133, 054505 (2011)] published Thu Feb 3, 2011.
- Evaluation of Compact and Effective Air-Cooled Carbon Foam Heat Sink
W. Wu, J. H. Du, Y. R. Lin, L. C. Chow, H. Bostanci, B. A. Saarloos, and D. P. Rini<br/> This study investigates a V-shaped corrugated carbon foam heat sink for thermal management of electronics with forced air convection. Experiments were conducted to determine the heat sink performance in terms of heat transfer coefficient and pressure drop. The test section, with overall dimensions o ... [J. Heat Transfer 133, 054504 (2011)] published Wed Feb 2, 2011.
- On the Cooling of Electronics With Nanofluids
W. Escher, T. Brunschwiler, N. Shalkevich, A. Shalkevich, T. Burgi, and B. Michel<br/> Nanofluids have been proposed to improve the performance of microchannel heat sinks. In this paper, we present a systematic characterization of aqueous silica nanoparticle suspensions with concentrations up to 31 vol %. We determined the particle morphology by transmission electron microscope imagi ... [J. Heat Transfer 133, 051401 (2011)] published Fri Feb 4, 2011.
- Parametric Numerical Study of Flow and Heat Transfer in Microchannels With Wavy Walls
Liang Gong, Krishna Kota, Wenquan Tao, and Yogendra Joshi<br/> Wavy channels were investigated in this paper as a passive scheme to improve the heat transfer performance of laminar fluid flow as applied to microchannel heat sinks. Parametric study of three-dimensional laminar fluid flow and heat transfer characteristics in microsized wavy channels was performed ... [J. Heat Transfer 133, 051702 (2011)] published Fri Feb 4, 2011.
- Diffusion-Thermo Effects on Free Convective Heat and Mass Transfer Flow in a Vertical Channel With Symmetric Boundary Conditions
Basant K. Jha and Abiodun O. Ajibade<br/> This article investigates the influence of diffusion-thermo effect on transient free convective heat and mass transfer flow in a channel bounded by two infinite vertical parallel plates. Fully developed laminar flow is considered when the boundaries are subjected to symmetric concentration and therm ... [J. Heat Transfer 133, 052502 (2011)] published Fri Feb 4, 2011.
- Transient Aspects of Heat Flux Bifurcation in Porous Media: An Exact Solution
Kun Yang and Kambiz Vafai<br/> The transient thermal response of a packed bed is investigated analytically. A local thermal nonequilibrium model is used to represent the energy transport within the porous medium. The heat flux bifurcation phenomenon in porous media is investigated for temporal conditions and two primary types of ... [J. Heat Transfer 133, 052602 (2011)] published Fri Feb 4, 2011.
- Flow and Heat Transfer Over a Continuously Moving Flat Plate in a Porous Medium
W. A. Khan and I. Pop<br/> The effects of the presence of an isotropic solid matrix and radiation on the forced convection boundary layer past a continuously moving flat plate is studied theoretically. The transformed nondimensional partial differential equations are solved numerically for some values of the governing paramet ... [J. Heat Transfer 133, 054501 (2011)] published Tue Feb 1, 2011.
- Pool Boiling Heat Transfer and Bubble Dynamics Over Plain and Enhanced Microchannels
Dwight Cooke and Satish G. Kandlikar<br/> Pool boiling is of interest in high heat flux applications because of its potential for removing large amount of heat resulting from the latent heat of evaporation and little pressure drop penalty for circulating coolant through the system. However, the heat transfer performance of pool boiling syst ... [J. Heat Transfer 133, 052902 (2011)] published Thu Feb 3, 2011.
- Visualization of Two-Phase Flows in Nanofluid Oscillating Heat Pipes
Qi-Ming Li, Jiang Zou, Zhen Yang, Yuan-Yuan Duan, and Bu-Xuan Wang<br/> Two-phase flows in an oscillating heat pipe (OHP) charged with deionized (DI) water and a nanofluid (0.268% v/v) were experimentally investigated. The OHP was made of quartz glass tube (with an inner diameter of 3.53 mm and an outer diameter of 5.38 mm) and coated with a transparent heating film in ... [J. Heat Transfer 133, 052901 (2011)] published Wed Feb 2, 2011.
- Second Law Analysis for Free Convection in Non-Newtonian Fluids Over a Horizontal Plate Embedded in a Porous Medium: Prescribed Surface Temperature
W. A. Khan and Rama Subba Reddy Gorla<br/> Second law characteristics of heat transfer and fluid flow due to free convection of non-Newtonian fluids over a horizontal plate with prescribed surface temperature in a porous medium are analyzed. Velocity and temperature fields are obtained numerically using an implicit finite difference method u ... [J. Heat Transfer 133, 052601 (2011)] published Wed Feb 2, 2011.
- Natural Convection in a Quadrantal Cavity Heated and Cooled on Adjacent Walls
Orhan Aydin and Gurkan Yesiloz<br/> In this study, experimental and numerical analyses of natural convection in a quadrantal cavity heated and cooled on adjacent walls have been made to examine heat and fluid flow. Experimental studies involve the use of the particle tracing method that enables us to visualize the flow pattern in the ... [J. Heat Transfer 133, 052501 (2011)] published Tue Feb 1, 2011.
- Prediction of Thermal Conductivity and Convective Heat Transfer Coefficient of Nanofluids by Local Composition Theory
M. S. Hosseini, A. Mohebbi, and S. Ghader<br/> In this study, a new method based on the local composition theory has been developed to predict thermal conductivity, convective heat transfer coefficient, and viscosity of nanofluids. The nonrandom two liquid (NRTL) model is used for this purpose. The effects of temperature and particle volume conc ... [J. Heat Transfer 133, 052401 (2011)] published Tue Feb 1, 2011.
- Development of a General Dynamic Pressure Based Single-Phase Spray Cooling Heat Transfer Correlation
Bahman Abbasi and Jungho Kim<br/> One of the main challenges of spray cooling technology is the prediction of local and average heat transfer coefficients on the heater surface. It is hypothesized that the local heat transfer coefficient can be predicted from the local normal pressure produced by the spray. In this study, hollow con ... [J. Heat Transfer 133, 052201 (2011)] published Mon Jan 31, 2011.
- Validation and Analysis of Numerical Results for a Varying Aspect Ratio Two-Pass Internal Cooling Channel
Igor V. Shevchuk, Sean C. Jenkins, Bernhard Weigand, Jens von Wolfersdorf, Sven Olaf Neumann, and Martin Schnieder<br/> Numerical results for an internal ribbed cooling channel including a 180 deg bend with a 2:1 inlet and a 1:1 aspect ratio outlet channel were validated against experimental results in terms of spatially resolved heat transfer distributions, pressure losses, and velocity distributions. The numerical ... [J. Heat Transfer 133, 051701 (2011)] published Mon Jan 31, 2011.
- Thermovibrational Instability in a Fluid Saturated Anisotropic Porous Medium
S. Saravanan and T. Sivakumar<br/> A comprehensive investigation is made to understand the effect of harmonic vibration on the onset of convection in a horizontal anisotropic porous layer heated either from below or from above. The layer is subject to vertical mechanical vibrations of arbitrary amplitude and frequency. The porous med ... [J. Heat Transfer 133, 051601 (2011)] published Tue Feb 1, 2011.
- Flow Boiling of R134a in Circular MicrotubesPart II: Study of Critical Heat Flux Condition
Saptarshi Basu, Sidy Ndao, Gregory J. Michna, Yoav Peles, and Michael K. Jensen<br/> A detailed experimental study was carried out on the critical heat flux (CHF) condition for flow boiling of R134a in single circular microtubes. The test sections had inner diameters (ID) of 0.50 mm, 0.96 mm, and 1.60 mm. Experiments were conducted over a large range of mass flux, inlet subcooling, ... [J. Heat Transfer 133, 051503 (2011)] published Thu Feb 3, 2011.
- Flow Boiling of R134a in Circular MicrotubesPart I: Study of Heat Transfer Characteristics
Saptarshi Basu, Sidy Ndao, Gregory J. Michna, Yoav Peles, and Michael K. Jensen<br/> An experimental study of two-phase heat transfer coefficients was carried out using R134a in uniformly heated horizontal circular microtubes with diameters from 0.50 mm to 1.60 mm over a range of mass fluxes, heat fluxes, saturation pressures, and vapor qualities. Heat transfer coefficients increase ... [J. Heat Transfer 133, 051502 (2011)] published Thu Feb 3, 2011.
- Investigation on Intertube Falling-Film Heat Transfer and Mode Transitions of Aqueous-Alumina Nanofluids
Binglu Ruan and Anthony M. Jacobi<br/> Horizontal-tube falling-film heat transfer characteristics of aqueous aluminum oxide nanofluids at concentrations of 0 vol %, 0.05 vol % (0.20 wt %), 0.5 vol % (1.96 wt %), 1 vol % (3.86 wt %) (with and without sodium dodecylbenzene sulfonate), and 2 vol % (7.51 wt %) are investigated and c ... [J. Heat Transfer 133, 051501 (2011)] published Mon Jan 31, 2011.
- Numerical Analysis of Specific Absorption Rate and Heat Transfer in the Human Body Exposed to Leakage Electromagnetic Field at 915 MHz and 2450 MHz
Teerapot Wessapan, Siramate Srisawatdhisukul, and Phadungsak Rattanadecho<br/> In recent years, society has increased utilization of electromagnetic radiation in various applications. This radiation interacts with the human body and may lead to detrimental effects on human health. However, the resulting thermophysiologic response of the human body is not well understood. In or ... [J. Heat Transfer 133, 051101 (2011)] published Mon Jan 31, 2011.
- Simulation on Flow and Heat Transfer in Diesel Particulate Filter
Kazuhiro Yamamoto and Masamichi Nakamura<br/> To reduce particulate matters including soot, a diesel particulate filter (DPF) has been developed for the after-treatment of exhaust gas. Since the filter is plugged with particles that would cause an increase of filter back-pressure, filter regeneration process is needed. However, there is not eno ... [J. Heat Transfer 133, 060901 (2011)] published Fri Mar 4, 2011.
- Cooling Characteristics of Regenerative Magnetic Refrigeration With Particle-Packed Bed
Tsuyoshi Kawanami, Shigeki Hirano, Masahiro Ikegawa, and Koji Fumoto<br/> The aim of our study was to elucidate the fundamental cooling characteristics and to improve the cooling characteristics of a room-temperature magnetic refrigerator operated under an active magnetic regenerator (AMR) cycle. The AMR refrigeration cycle, which includes a thermal storage process and a ... [J. Heat Transfer 133, 060903 (2011)] published Fri Mar 4, 2011.
- Convective Heat Transfer in Graphite Foam Heat Sinks With Baffle and Stagger Structures
K. C. Leong, H. Y. Li, L. W. Jin, and J. C. Chai<br/> Highly conductive porous media have recently been considered for enhanced cooling applications due to their large internal contact surface area, which promotes convection at the pore level. In this paper, graphite foams that possess high thermal conductivity but low permeability are investigated for ... [J. Heat Transfer 133, 060902 (2011)] published Fri Mar 4, 2011.
- A Semi-Empirical Model for Condensation Heat Transfer Coefficient of Mixed Ethanol-Water Vapors
Yang Li, JunJie Yan, JinShi Wang, and GuoXiang Wang<br/> A semi-empirical model describing the heat transfer characteristics of the pseudo-dropwise condensation of binary vapor on a cooled vertical tube has been formulated. By ignoring the thin film always present on the condensation surface and the intensification of mass transfer caused by the Marangoni ... [J. Heat Transfer 133, 061501 (2011)] published Wed Mar 2, 2011.
- Heat Transfer Performance of Aluminum Foams
Simone Mancin, Claudio Zilio, Luisa Rossetto, and Alberto Cavallini<br/> Because of their interesting heat transfer and mechanical properties, metal foams have been proposed for several different applications, thermal and structural. This paper aims at pointing out the effective thermal fluid dynamic behavior of these new enhanced surfaces, which present high heat transf ... [J. Heat Transfer 133, 060904 (2011)] published Fri Mar 4, 2011.
- Geometrical Effects on the Temperature Distribution in a Half-Space Due to a Moving Heat Source
Mohsen Akbari, David Sinton, and Majid Bahrami<br/> Fundamental problem of heat transfer within a half-space due to a moving heat source of hyperelliptical geometry is studied in this work. The considered hyperelliptical geometry family covers a wide range of heat source shapes, including star-shaped, rhombic, elliptical, rectangular with round corne ... [J. Heat Transfer 133, 064502 (2011)] published Wed Mar 2, 2011.
- On the Scalability of Liquid Microjet Array Impingement Cooling for Large Area Systems
Avijit Bhunia and C. L. Chen<br/> The necessity for an efficient thermal management system covering large areas is growing rapidly with the push toward more electric systems. A significant amount of research over the past 2 decades has conclusively proved the suitability of jet, droplet, or spray impingement for high heat flux cooli ... [J. Heat Transfer 133, 064501 (2011)] published Wed Mar 2, 2011.
- Mathematical Modeling of Transport Processes in Funnel Shaped Mold of Steel Thin Slab Continuous Caster
A. Hajari, S. H. Seyedein, and M. R. Aboutalebi<br/> In this work a three-dimensional fluid flow and heat transfer model was developed to predict the flow pattern and superheat dissipation in funnel shaped mold of a thin slab continuous caster with a novel tetrafurcated design for the submerged entry nozzle. Low Reynolds kepsilon turbulent model was a ... [J. Heat Transfer 133, 064503 (2011)] published Wed Mar 2, 2011.
- Erratum: The Effect of Buoyancy on Heat Transfer in Supercritical Water Flow in a Horizontal Round Tube [ASME J. Heat Transfer, 2005, 127(8), pp. 897902]
Majid Bazargan, Daniel Fraser, and Vijay Chatoorgan<br/> Abstract not available. [J. Heat Transfer 133, 067001 (2011)] published Wed Mar 2, 2011.
- Generalization of the Heat Transfer Coefficient Concept for System Simulation
Mohamed-Nabil Sabry<br/> Large progress has been realized in modeling conduction heat transfer problems over the past decade by the introduction of high performance compact thermal models (CTMs) mainly developed for thermal design of complicated electronic systems. The objective of this paper is to generalize these advances ... [J. Heat Transfer 133, 060905 (2011)] published Mon Mar 7, 2011.
- Thermal Issues in Emerging Technologies
Yogendra Joshi and Mohamed-Nabil Sabry<br/> Abstract not available. [J. Heat Transfer 133, 060301 (2011)] published Mon Mar 7, 2011.
- A Review of Microscale Transport in the Thermal Processing of New and Emerging Advanced Materials
Yogesh Jaluria and Jing Yang<br/> This paper reviews the microscale transport processes that arise in the fabrication of advanced materials. In many cases, the dimensions of the device being fabricated are in the micrometer length scale and, in others, underlying transformations that determine product quality and characteristics are ... [J. Heat Transfer 133, 060906 (2011)] published Mon Mar 7, 2011.
- Measuring the Thermal Conductivity of Porous, Transparent SiO Films With Time Domain Thermoreflectance
Patrick E. Hopkins, Bryan Kaehr, Leslie M. Phinney, Timothy P. Koehler, Anne M. Grillet, Darren Dunphy, Fred Garcia, and C. Jeffrey Brinker<br/> Nanocomposites offer unique capabilities of controlling thermal transport through the manipulation of various structural aspects of the material. However, measurements of the thermal properties of these composites are often difficult, especially porous nanomaterials. Optical measurements of these pr ... [J. Heat Transfer 133, 061601 (2011)] published Wed Mar 9, 2011.
- Thermal and Visual Observation of Water and Acetone Oscillating Heat Pipes
C. Wilson, B. Borgmeyer, R. A. Winholtz, H. B. Ma, D. Jacobson, and D. Hussey<br/> A visual and thermal experimental investigation of four oscillating heat pipes (OHPs) was conducted to observe fluid flow of liquid plugs and vapor bubbles in the OHP and its effect on the temperature distribution and heat transfer performance in an OHP. These four OHPs consist of an open loop water ... [J. Heat Transfer 133, 061502 (2011)] published Tue Mar 8, 2011.
- Numerical and Experimental Investigation of Laminar Channel Flow With a Transparent Wall
Jing He, Liping Liu, and Anthony M. Jacobi<br/> A numerical and experimental investigation is undertaken for developing laminar flow in a duct with one opaque, uniformly heated wall and one transparent wall. In the numerical model, mixed convection, radiative exchange, as well as two-dimensional conduction in the substrate are considered. Experim ... [J. Heat Transfer 133, 061701 (2011)] published Wed Mar 9, 2011.
- Anharmonic Phonon Interactions at Interfaces and Contributions to Thermal Boundary Conductance
Patrick E. Hopkins, John C. Duda, and Pamela M. Norris<br/> Continued reduction in characteristic dimensions in nanosystems has given rise to increasing importance of material interfaces on the overall system performance. With regard to thermal transport, this increases the need for a better fundamental understanding of the processes affecting interfacial th ... [J. Heat Transfer 133, 062401 (2011)] published Wed Mar 9, 2011.
- Heat Conduction Equation Solution in the Presence of a Change of State in a Bounded Axisymmetric Cylindrical Domain
Danillo Silva de Oliveira and Fernando Brenha Ribeiro<br/> The heat conduction problem, in the presence of a change of state, was solved for the case of an indefinitely long cylindrical layer cavity. As boundary conditions, it is imposed that the internal surface of the cavity is maintained below the fusion temperature of the infilling substance and the ext ... [J. Heat Transfer 133, 062301 (2011)] published Tue Mar 8, 2011.
- Natural Convection in a Saturated Variable-Porosity Medium Due to Microwave Heating
Watit Pakdee and Phadungsak Rattanadecho<br/> Microwave heating of a porous medium with a nonuniform porosity is numerically investigated based on a proposed numerical model. A two-dimensional variation of porosity of the medium is considered. The generalized non-Darcian model developed takes into account the presence of a solid drag and the in ... [J. Heat Transfer 133, 062502 (2011)] published Tue Mar 8, 2011.
- High Rayleigh Number Natural Convection Inside 2D Porous Enclosures Using the Lattice Boltzmann Method
Ramanathan Vishnampet, Arunn Narasimhan, and V. Babu<br/> Lattice Boltzmann method (LBM) is employed to investigate natural convection inside porous medium enclosures at high Rayleigh numbers. Volume averaged porous medium model is coupled with the lattice Boltzmann formulation of the momentum and energy equations for fluid flow. A parallel implementation ... [J. Heat Transfer 133, 062501 (2011)] published Tue Mar 8, 2011.
- Analysis of Radiation Modeling for Turbulent Combustion: Development of a Methodology to Couple Turbulent Combustion and Radiative Heat Transfer in LES
Damien Poitou, Mouna El Hafi, and Benedicte Cuenot<br/> Radiation exchanges must be taken into account to improve large eddy simulation (LES) prediction of turbulent combustion, in particular, for wall heat fluxes. Because of its interaction with turbulence and its impact on the formation of polluting species, unsteady coupled calculations are required. ... [J. Heat Transfer 133, 062701 (2011)] published Thu Mar 10, 2011.
- Comparisons of Pins/Dimples/Protrusions Cooling Concepts for a Turbine Blade Tip-Wall at High Reynolds Numbers
Gongnan Xie, Bengt Sunden, and Weihong Zhang<br/> The blade tip region encounters high thermal loads because of the hot gas leakage flows, and it must therefore be cooled to ensure a long durability and safe operation. A common way to cool a blade tip is to design serpentine passages with a 180 deg turns under the blade tip-cap inside the turbine b ... [J. Heat Transfer 133, 061902 (2011)] published Thu Mar 10, 2011.
- Transient Thermal Response of Pin-Fin Sandwich Panels to Hot Jet Impingement
S. S. Feng, T. J. Lu, and T. Kim<br/> The transient thermal response of a sandwich panel with pin-fin core subjected to nonuniform impinging jet heating was investigated theoretically and experimentally. Forced convection flow passing through the sandwich channel was employed to remove heat imposed nonuniformly on the pin-fin sandwich. ... [J. Heat Transfer 133, 061901 (2011)] published Thu Mar 10, 2011.
- Estimation and Analysis of Surface Heat Flux During Quenching in CNT Nanofluids
K. Babu and T. S. Prasanna Kumar<br/> In this article, water based carbon nanotube (CNT) nanofluids have been used as quenchants to study their effects on the heat transfer rate during immersion quenching. For this purpose, water based CNT nanofluids were prepared by dispersing CNTs with and without the use of surfactant. Quench probes ... [J. Heat Transfer 133, 071501 (2011)] published Fri Apr 1, 2011.
- Approximation of Transient 1D Conduction in a Finite Domain Using Parametric Fractional Derivatives
Sergio M. Pineda, Gerardo Diaz, and Carlos F. M. Coimbra<br/> A solution to the problem of transient one-dimensional heat conduction in a finite domain is developed through the use of parametric fractional derivatives. The heat diffusion equation is rewritten as anomalous diffusion, and both analytical and numerical solutions for the evolution of the dimension ... [J. Heat Transfer 133, 071301 (2011)] published Fri Apr 1, 2011.
- Prevention and Intensification of Melt-Water Explosive Interactions
Stephen M. Zielinski, Anthony A. Sansone, Matthew Ziolkowski, and Rusi P. Taleyarkhan<br/> The combination of a hot fluid (e.g., molten metals) and a cold vaporizing fluid (e.g., water) can undergo spontaneous or externally assisted explosive interactions. Such explosions are a well-established contributor to the risk for nuclear reactors exemplified by the infamous Chernobyl accident. On ... [J. Heat Transfer 133, 071201 (2011)] published Wed Mar 30, 2011.
- Heat Transfer to Flat Strips Immersed in a Fluidized Bed
Christopher Penny, Dennis Rosero, David Naylor, and Jacob Friedman<br/> Heat transfer to objects immersed in a fluidized bed has been studied extensively across a relatively large range of geometries, though most work has looked at cylinders, a geometry important in power generation fluidized bed applications. As the power generation industry has been the primary stimul ... [J. Heat Transfer 133, 071703 (2011)] published Wed Mar 30, 2011.
- Explicit Inversion of Stodola's Area-Mach Number Equation
Joseph Majdalani and Brian A. Maicke<br/> Stodola's area-Mach number relation is one of the most widely used expressions in compressible flow analysis. From academe to aeropropulsion, it has found utility in the design and performance characterization of numerous propulsion systems; these include rockets, gas turbines, microcombustors, and ... [J. Heat Transfer 133, 071702 (2011)] published Wed Mar 30, 2011.
- Effect of Turbulent Prandtl Number on Convective Heat Transfer to Turbulent Flow of a Supercritical Fluid in a Vertical Round Tube
Mahdi Mohseni and Majid Bazargan<br/> A two-dimensional numerical model is developed to study the effect of the turbulent Prandtl number Pr on momentum and energy transport in a highly variable property flow of supercritical fluids in a vertical round tube. Both regimes of enhanced and deteriorated heat transfer have been investigated. ... [J. Heat Transfer 133, 071701 (2011)] published Wed Mar 30, 2011.
- Direct and Indirect Methods for Calculating Thermal Emission From Layered Structures With Nonuniform Temperatures
L. P. Wang, S. Basu, and Z. M. Zhang<br/> The determination of emissivity of layered structures is critical in many applications, such as radiation thermometry, microelectronics, radiative cooling, and energy harvesting. Two different approaches, i.e., the indirect and direct methods, are commonly used for computing the emissivity of an obj ... [J. Heat Transfer 133, 072701 (2011)] published Fri Apr 1, 2011.
- Effects of Suction and Blowing on Flow and Heat Transfer Between Two Rotating Spheres With Time-Dependent Angular Velocities
Omid Mahian, Asgahr B. Rahimi, and Ali Jabari Moghadam<br/> The effect of suction and blowing in the study of flow and heat transfer of a viscous incompressible fluid between two vertically eccentric rotating spheres is presented when the spheres are maintained at different temperatures and rotating about a common axis while the angular velocities of the sph ... [J. Heat Transfer 133, 071704 (2011)] published Fri Apr 1, 2011.
- Heat Transfer Characteristics of Gaseous Slip Flow in Concentric Micro-Annular Tubes
Chungpyo Hong, Yutaka Asako, and Koichi Suzuki<br/> A concentric micro-annular passage is a basic and important microgeometry of microfluidic-systems from simple heat exchanger to the most complicated nuclear reactors. Therefore, heat transfer characteristics of gaseous flows in concentric micro-annular tubes with constant heat flux whose value was p ... [J. Heat Transfer 133, 071706 (2011)] published Mon Apr 4, 2011.
- Electro-Osmotic Heat Transfer of Non-Newtonian Fluid Flow in Microchannels
Chien-Hsin Chen<br/> A theoretical analysis is presented to explore the transport characteristics of electro-osmotic flow and associated heat transfer of non-Newtonian power-law fluids in a parallel plate microchannel. The formulation shows that the key parameters governing the current problem include the flow behavior ... [J. Heat Transfer 133, 071705 (2011)] published Mon Apr 4, 2011.
- Bejan's Constructal Theory Analysis of Gas-Liquid Cooled Finned Modules
Giulio Lorenzini and Simone Moretti<br/> High performance heat exchangers represent nowadays the key of success to go on with the trend of miniaturizing electronic components as requested by the industry. This numerical study, based on Bejan's Constructal theory, analyzes the thermal behavior of heat removing fin modules, comparing their p ... [J. Heat Transfer 133, 071801 (2011)] published Wed Apr 6, 2011.
- Convective Heat Transfer in a Rotor Stator System Air Gap With Multiple Suctions of Fluid Through the Stator
Julien Pelle and Souad Harmand<br/> The experimental work presented in this paper relates to the local convective heat transfer on the rotor surface in the airgap of a discoidal rotor stator system. The stator used in these experiments is a multiperforated disk in which an air suction due to the rotation of the rotor comes through and ... [J. Heat Transfer 133, 071707 (2011)] published Mon Apr 4, 2011.
- Forced Convection in a Channel Partly Occupied by a Bidisperse Porous Medium: Symmetric Case
D. A. Nield and A. V. Kuznetsov<br/> An analytic solution is obtained for the problem of fully developed forced convection in a channel between parallel plane walls, partly occupied by a bidisperse porous medium (BDPM) and partly by a fluid clear of solid material, the distribution of material being symmetrical with the BDPM forming ei ... [J. Heat Transfer 133, 072601 (2011)] published Tue Apr 5, 2011.
- Natural Convection in a Rocking Square Enclosure: Experimental Results
R. Chavez, F. J. Solorio, and J. G. Cervantes<br/> Experimental results for the natural convection in a rocking enclosure are presented. A square closed cavity heated from below and cooled from above periodically turns around of its horizontal symmetry central line. The oscillation amplitude was from 15 deg to 15 deg, and four time periods were empl ... [J. Heat Transfer 133, 072501 (2011)] published Wed Apr 6, 2011.
- Transient Energy and Heat Transport in Metals: Effect of the Discrete Character of the Lattice
Y. Ezzahri, K. Joulain, and A. Shakouri<br/> A recently developed Shastry's formalism for energy transport is used to analyze the temporal and spatial behaviors of the electron energy and heat transport in metals under delta function excitation at the surface. Comparison with Cattaneo's model is performed. Both models show the transition betwe ... [J. Heat Transfer 133, 072401 (2011)] published Tue Apr 5, 2011.
- Study of Laminar Forced Convection of Radiating Gas Over an Inclined Backward Facing Step Under Bleeding Condition Using the Blocked-Off Method
A. B. Ansari and S. A. Gandjalikhan Nassab<br/> This paper presents a numerical investigation for laminar forced convection flow of a radiating gas over an inclined backward facing step in a horizontal duct subjected to bleeding condition. The fluid is treated as a gray, absorbing, emitting, and scattering medium. The two-dimensional Cartesian co ... [J. Heat Transfer 133, 072702 (2011)] published Tue Apr 5, 2011.
- Thermal Nonequilibrium and Viscous Dissipation in the Thermal Entrance Region of a Darcy Flow With Streamwise Periodic Boundary Conditions
A. Barletta, E. Rossi di Schio, and L. Selmi<br/> The thermal entrance region in a plane-parallel channel filled by a fluid saturated porous medium is investigated with reference to steady forced convection and to a thermal boundary condition given by a wall temperature longitudinally varying with a sinusoidal law. The effect of viscous dissipation ... [J. Heat Transfer 133, 072602 (2011)] published Wed Apr 6, 2011.
- A Correlation for Confined Nucleate Boiling Heat Transfer
Mark Aaron Chan, Christopher R. Yap, and Kim Choon Ng<br/> This study presents a generalized confined boiling correlation applicable for various working fluids and operating conditions. A dimensionless parameter, Bond number, has been incorporated into the correlation to include the effects of confinement in the ebullition process of boiling. The proposed c ... [J. Heat Transfer 133, 074502 (2011)] published Tue Apr 5, 2011.
- On the Linear Temperature Dependence of Phonon Thermal Boundary Conductance in the Classical Limit
John C. Duda, Pamela M. Norris, and Patrick E. Hopkins<br/> We present a new model for predicting thermal boundary conductance in the classical limit. This model takes a different form than those of the traditionally used mismatch theories in the fact that the temperature dependence of thermal boundary conductance is driven by the phononic scattering mechani ... [J. Heat Transfer 133, 074501 (2011)] published Mon Apr 4, 2011.
- Liquid Evaporation on Superhydrophobic and Superhydrophilic Nanostructured Surfaces
Nenad Miljkovic, Ryan Enright, Shalabh C. Maroo, H. Jeremy Cho, and Evelyn N. Wang<br/> Abstract not available. [J. Heat Transfer 133, 080903 (2011)] published Wed Apr 27, 2011.