Journal of Heat Transfer: Recent submissions
Now showing items 461-480 of 3611
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Two-Phase Heat Transfer and Flow Regimes in Pin Fin-Enhanced Microgaps—Effect of Pin Spacing
(The American Society of Mechanical Engineers (ASME), 2020)An experimental investigation of the flow boiling of dielectric refrigerant R245fa is conducted in microgaps with enhancement features. A silicon microgap of height 200 μm populated with pin fin arrays of diameter 150 μm ... -
Thermal Behavior of Teeth During Restoration Procedure With Composite: Experimental Tests and Numerical Simulation
(The American Society of Mechanical Engineers (ASME), 2020)Different thermal mechanisms influence the tooth temperature during the reconstruction practice of tooth restoration: conduction in the hard tissues and their thermal capacitance, heat generation by composite curing, ... -
A Simple Approach to Evaluate Near Field Thermal Radiation From Emitters With Layered Structures and Temperature Variations in One Direction
(The American Society of Mechanical Engineers (ASME), 2020)A simple analytical calculation scheme to determine near field radiation through decomposing an emission domain into lots of thin thermal current sheets is presented. Through finding the orthogonal modes of thermal current ... -
Pore Scale Numerical Investigation of Mixed Convection From an Isolated Heat Source in a Channel With a Porous Insert
(The American Society of Mechanical Engineers (ASME), 2020)Mixed convection heat transfer in a channel filled with porous medium and containing an isolated heat source at the bottom wall is studied in this work. The porous medium is assumed to be made of circular cylinders and is ... -
Thermofluid Characteristics on Natural and Mixed Convection Heat Transfer From a Vertical Rotating Hollow Cylinder Immersed in Air: A Numerical Exercise
(The American Society of Mechanical Engineers (ASME), 2020)Numerical investigations are performed on natural and mixed convection around stationary and rotating vertical heated hollow cylinder with negligible wall thickness suspended in the air. The fluid flow and heat transfer ... -
Heat Accumulation in Ultrafast Laser Scanning of Fused Silica
(The American Society of Mechanical Engineers (ASME), 2020)In this work, a numerical model to predict the heat accumulation of fused silica induced by ultrafast laser scanning is put forward, which is composed of an ionization model and a steady electromagnetic model. The ionization ... -
Critical Heat Flux on Curved Calandria Vessel of Indian PHWRs During Severe Accident Condition
(The American Society of Mechanical Engineers (ASME), 2020)In pressurized heavy water reactors (PHWRs), during an unmitigated severe accident, the absence of adequate cooling arising from multiple failures of the cooling system leads to the collapse of pressure tubes and calandria ... -
Characterization and Scaling of Forced Convective Swirl in Sinusoidal Wavy-Plate-Fin Cores of Compact Heat Exchangers
(The American Society of Mechanical Engineers (ASME), 2020)The characterization and scaling of the thermal-hydraulic performance in wavy plate-fin compact heat exchanger cores, based on the understanding of the physical phenomena and heat transfer enhancement mechanism is delineated. ... -
Numerical Study on Forced Convection Heat Transfer Across a Heated Circular Tube Based on Bingham Model With Thermally Dependent Viscosity
(The American Society of Mechanical Engineers (ASME), 2020)The flow and heat transfer performance of Bingham fluid with thermally dependent viscosity across a heated circular tube have been numerically investigated (2408 ≤ ReB ≤ 5852, 9 ≤ Pr ≤ 23 and 10 ≤Bn ≤ 90). The modified ... -
Droplet Evaporation of Cu–Al2O3 Hybrid Nanofluid Over Its Residue and Copper Surfaces: Toward Developing a New Analytical Model
(The American Society of Mechanical Engineers (ASME), 2020)Droplet evaporation-based cooling techniques, such as the spray cooling, give high heat transfer rates by utilizing latent energy and are usually preferred in thermal applications. However, with the significant rise in ... -
Numerical Study of Pool Boiling Heat Transfer From Surface With Protrusions Using Lattice Boltzmann Method
(The American Society of Mechanical Engineers (ASME), 2020)This paper reports our numerical studies on pool boiling heat transfer from a plane and with protruding surface using single component pseudo-potential phase change model of lattice Boltzmann method. The surface protrusions ... -
On the Development of Correlations for Bubble Liftoff Parameters During Subcooled Nucleate Flow Boiling Using Nonintrusive Dynamic Measurements
(The American Society of Mechanical Engineers (ASME), 2020)Accurate prediction of bubble dynamic parameters is essential to improve boiling heat transfer models. Considering the complexities and challenges associated with performing a large number of boiling experiments, researchers ... -
Whole Field Measurements to Understand the Role of Varying Depths of Nucleation Site on Vapor Bubble Dynamics and Heat Transfer Rates
(The American Society of Mechanical Engineers (ASME), 2020)This work studies the possible effects of varying depths of cavity on bubbling features and the associated heat transfer rates in nucleate pool boiling regime. A single vapor bubble has been generated on a substrate with ... -
New Forward and Inverse Solutions for Wet Fins Generalized Profiles With All Nonlinear Phenomena
(The American Society of Mechanical Engineers (ASME), 2020)This study establishes forward closed-form and inverse analyses of wet fins of various profiles involving all modes of heat transfer. Existing limitations in the literature are addressed here by choosing the appropriate ... -
Heat Transfer in Composite Spheroids
(The American Society of Mechanical Engineers (ASME), 2020)Heat transfer from a composite prolate spheroid under the third-type boundary condition is investigated using a Legendre series expansion. The model is verified against published data on cooling boiled eggs and also against ... -
Assessment of a Food-Warming Cabinet for Heat and Humidity Decontamination of N95 Respirators
(The American Society of Mechanical Engineers (ASME), 2020)During the COVID19 pandemic, various investigations have been conducted to determine if personal protective equipment (PPE), and specifically N95 masks, can be decontaminated for reuse when unused equipment is not available. ... -
Algal Biomass Harvesting Using Low-Grade Waste Heat: Evaluation of Overall Heat Transfer Coefficient in a Heat Exchanger
(The American Society of Mechanical Engineers (ASME), 2020)This study is part of a broader study on a novel method for harvesting algae by evaporation, and it investigated the feasibility of heating algal biomass using low-grade waste heat in a heat exchanger. Computational fluid ... -
Experimental Investigation of Composite Phase Change Material Heat Sinks for Enhanced Passive Thermal Management
(The American Society of Mechanical Engineers (ASME), 2020)Phase change materials (PCMs) are effective at storing thermal energy and are attractive for use in electronics to smooth temperature peaks during periods of high demand; however, the use of PCMs has been somewhat limited ... -
The Effect of Surface Thermal Radiation on Heat Transfer in a Ventilated Cavity
(The American Society of Mechanical Engineers (ASME), 2020)In this work, experimental and numerical results were obtained to analyze the effect of surface thermal radiation on heat transfer by mixed convection in a ventilated cavity. Experimental temperature profiles were obtained ... -
Numerical Consideration of LTNE and Darcy Extended Forchheimer Models for the Analysis of Forced Convection in a Horizontal Pipe in the Presence of Metal Foam
(The American Society of Mechanical Engineers (ASME), 2020)The intent of the current research work is to emphasize the computational modeling of forced convection heat dissipation in the presence of high porosity and thermal conductivity metallic foam in a horizontal pipe for ...