Journal of Heat Transfer: Recent submissions
Now showing items 381-400 of 3611
-
Validity of Performance Factors Used in Recent Studies on Heat Transfer Enhancement of Nanofluids
(The American Society of Mechanical Engineers (ASME), 2021)Many previous studies used the performance factors for the evaluation of heat transfer enhancement of nanofluids under the identical pumping power. The validity of the performance factors was not examined yet. The validity ... -
Comparative Study on the Numerical Methods for View Factor Computation for Packed Pebble Beds: Back Propagation Neural Network Methods Versus Monte Carlo Methods
(The American Society of Mechanical Engineers (ASME), 2021)It's an unsolved problem to calculate the thermal radiation view factors among fuel pebbles as accurately and quickly as possible in the simulation of the temperature fields within the pebble-bed. In this study, a series ... -
Semi-Analytical Solution of a Nonlinear Heat Transfer Model for a Tubular Cocurrent Moving-Bed Reactor With a First-Order Chemical Reaction in the Solid Phase
(The American Society of Mechanical Engineers (ASME), 2021)The development of mathematical models plays a fundamental role in the design, optimization, and control of processes. Regarding heat transfer in moving bed reactors, the chemical reaction implies the inclusion of a ... -
The Thermohydraulic Characteristics and Optimization Study of Radial Porous Heat Sinks Using Multi-Objective Computational Method
(The American Society of Mechanical Engineers (ASME), 2021)The use of porous media (PM) to improve conductive heat transfer has been at the focus of interest in recent years. Limited studies, however, have focused on heat transfer in radial heat sinks (RHSs) fully and partially ... -
Augmentation of Pure Mixed Convection Heat Transfer in a Non-Newtonian Power-Law Fluid Filled Lid-Driven Trapezoidal Cavity With Double Rotating Cylinders
(The American Society of Mechanical Engineers (ASME), 2021)In this study, a numerical investigation on mixed convection inside a trapezoidal cavity with a pair of rotating cylinders has been conducted. Three different power-law fluid indexes (n = 1.4, 1.0, and 0.6) have been ... -
Effect of Ultralow Concentrated Reduced Graphene Oxide Nanofluid on Radiator Performance
(The American Society of Mechanical Engineers (ASME), 2021)Nanocoolants are engineered colloidal suspensions of nanoparticles in a conventional coolant (water–ethylene glycol). Use of metals and metallic oxide nanofluids at concentrations greater than 0.01 vol % has been studied ... -
Computational Fluid Dynamics—Machine Learning Prediction of Machinery Coupling Windage Heating and Power Loss
(The American Society of Mechanical Engineers (ASME), 2021)Couplings connect the spinning shafts of driving and driven machines in the industry. A coupling guard encloses the coupling to protect personnel from the high-speed rotating coupling. The American Petroleum Institute API ... -
A Multiscale Method for Coupled Steady-State Heat Conduction and Radiative Transfer Equations in Composite Materials
(The American Society of Mechanical Engineers (ASME), 2021)Predictions of coupled conduction-radiation heat transfer processes in periodic composite materials are important for applications of the materials in high-temperature environments. The homogenization method is widely used ... -
New Correlations for Flow and Conjugate Heat Transfer With Surface Radiation Characteristics of a Real-Scale Infrared Suppression System With Conical Funnels
(The American Society of Mechanical Engineers (ASME), 2021)The consistent and accurate prediction of fluid flow and heat transfer characteristics in an infrared suppression (IRS) device is challenging due to the complex nature of the flow features. The cool ambient air intake and ... -
Evolutionary Design of Novel Coolant Passages for Cooling a Square Substrate by Single Stream
(The American Society of Mechanical Engineers (ASME), 2021)Different designs of novel coolant (i.e., water) circuits have been proposed using a well-established constructal law to cool a square substrate made up of aluminum oxide and subjected to a uniform wall heat flux (i.e., ... -
The Role of Secondary Flows and Separation in Convective Heat Transfer in a Rotating Radial Vane Brake Disk
(The American Society of Mechanical Engineers (ASME), 2021)This study presents, for the first time, distributions of local internal temperature and convective heat transfer in a rotating radial vane brake disk and explains mechanisms in conjunction with secondary flows and flow ... -
Onset of Boiling, Heat Transfer, and Flow Patterns of Flow Boiling on the Superhydrophobic Porous Copper Surface in a Microchannel
(The American Society of Mechanical Engineers (ASME), 2021)To explore the effect of microstructured porous surface on enhancing the heat transfer of flow boiling in a microchannel, the microporous copper surface was fabricated with microscale pores in ranges of 1–5 μm, which ... -
Multifractality and Universality of Thermal Fluctuations in Terrestrial and Microgravity Pool Boiling
(The American Society of Mechanical Engineers (ASME), 2021)Nucleation site interaction in pool boiling is well known to cause intermittent bubble growth and departure. Such interactions can cause long-term temporal correlations in spatio-temporal fluctuations of temperature and ... -
Erratum: “Flow Regimes for Laminar Film Condensation on a Vertical Plate With an Upward Vapor Flow” [ASME J. Heat Transfer, 142, pp. 041603-1–041603-9 (2020); DOI: 10.1115/1.4046307]
(The American Society of Mechanical Engineers (ASME), 2021)The expression for the boundary condition of the solution types (ii) and (iii) at the bottom (z = 0), Eq. (27) in the original paper, is incorrect. The correct version is (1)V0=−duδdx(ζ−ζ2Δ+ζ33Δ2−Δ3)−(U∞−uδ)[(−1+2ζΔ−ζ2Δ2 ... -
New Improved Method for Heat Transfer Calculation Inside Rough Pipes
(The American Society of Mechanical Engineers (ASME), 2021)An improved method for heat transfer calculations inside rough tubes is provided. The model has been obtained from a second assessment developed early by the authors on fluid flow in single-phase inside rough tubes. The ... -
Experimental Investigation on the Change in Flow Boiling Characteristics Due to Boiling-Induced Copper Ageing
(The American Society of Mechanical Engineers (ASME), 2021)Heat sinks and heat exchangers based on flow boiling in mini/microchannels are expected to be more compact and efficient. One of the major challenges while using copper material for phase-change heat transfer application ... -
Nonlinear Approximation for Natural Convection Flow Near a Vertical Plate With Thermal Radiation Effect
(The American Society of Mechanical Engineers (ASME), 2021)A nonlinear approximation for natural convection boundary layer flow near a vertical wall under the influence of thermal radiation is analyzed. The governing nonlinear partial differential equations are transformed into ... -
Thermal-Hydraulic Optimization of Open-Cell Metallic Foams Used as Extended Surfaces
(The American Society of Mechanical Engineers (ASME), 2021)A one-dimensional analytical validated model for predicting temperature distribution, heat transfer, pressure drop, and fluid pumping power in an open-cell metal foam (OCMF) fin is developed. A foam length optimization ... -
On the Impact of Aspect Ratio and Other Geometric Effects on the Stability of Rectangular Thermosiphons
(The American Society of Mechanical Engineers (ASME), 2021)Single-phase natural circulation thermosiphon loops have been attracting increased interest as they represent the prototype of passive safety systems. However, the stability properties of thermosiphon loops, which can ... -
Numerical Simulation of the Flow and Heat Transfer Induced by Corona Discharge Coupling With Electrostatically Forced Vibration
(The American Society of Mechanical Engineers (ASME), 2021)A thin, flexible plate electrode was adopted to generate both ionic wind and vibration in our previous study. The design contains a metal inductor placed next to the plate electrode so that it is attracted to vibrate by ...