Journal of Heat Transfer: Recent submissions
Now showing items 1641-1660 of 3611
-
Flow Pattern Based Heat Transfer Correlations for Stable Flow Boiling in Micro/Minichannels
(The American Society of Mechanical Engineers (ASME), 2016)Flowpattern based heat transfer correlations for elongated bubbly flow and annular flow in stable flow boiling micro/minichannels were developed separately based on a collected micro/minichannel heattransfer database by ... -
Optimum Operating Conditions for Subcritical/Supercritical Fluid Based Natural Circulation Loops
(The American Society of Mechanical Engineers (ASME), 2016)Natural circulation loop (NCL) is simple and reliable due to the absence of moving components and is preferred in applications where safety is of foremost concern, such as nuclear power plants and highpressure thermal power ... -
Unstable Forced Convection in a Plane Porous Channel With Variable Viscosity Dissipation
(The American Society of Mechanical Engineers (ASME), 2016)Fully developed and stationary forced convection in a planeparallel porous channel is analyzed. The boundary walls are modeled as impermeable and subject to external heat transfer. Different Biot numbers are defined at the ... -
Thermosolutal Mixed Convection in an Air Filled Ventilated Enclosure With Slot Wise Embedded Heat and Contaminant Sources
(The American Society of Mechanical Engineers (ASME), 2016)Airflow, heat, and contaminant transfer in a mechanically ventilated twodimensional rectangular enclosure by discrete heat and contaminant sources as well as external forced convection at various inlet and outlet locations ... -
Dynamic Control of Radiative Surface Properties With Origami Inspired Design
(The American Society of Mechanical Engineers (ASME), 2016)Thermal management systems for space equipment commonly use static solutions that do not adapt to environmental changes. Dynamic control of radiative surface properties is one way to respond to environmental changes and ... -
Numerical Analysis of Flow Structure and Heat Transfer Characteristics in Dimpled Channels With Secondary Protrusions
(The American Society of Mechanical Engineers (ASME), 2016)Dimple structure is an effective heat transfer augmentation approach on coolant channel due to its advantage on pressure penalty. The implication of secondary protrusion, which indicates protrusion with smaller dimension ... -
Thermal Conductivity of Self Assembling Symmetric Block Copolymer Thin Films of Polystyrene Block Poly(methyl methacrylate)
(The American Society of Mechanical Engineers (ASME), 2016)The thermal conductivities of both disordered and selfassembled symmetric polystyreneblockpoly(methyl methacrylate) (PSbPMMA) copolymer films were measured using timedomain thermoreflectance (TDTR). The variation in ... -
Influence of Controlled Aggregation on Thermal Conductivity of Nanofluids
(The American Society of Mechanical Engineers (ASME), 2016)Nanoparticles aggregation is considered, by the heat transfer community, as one of the main factors responsible for the observed enhancement in the thermal conductivity of nanofluids. To gain a better insight into the ... -
Determination of Scattering and Absorption Coefficients of Porous Silica Aerogel Composites
(The American Society of Mechanical Engineers (ASME), 2016)Silica aerogels are porous ultralight materials with exceptional physical properties that are promising materials for thermal insulation applications. This paper theoretically and experimentally investigates the spectral ... -
Second Law Analysis Through a Porous Poiseuille–Benard Channel Flow
(The American Society of Mechanical Engineers (ASME), 2016)This paper proposes a numerical analysis of entropy generation during mixed convection inside a porous Poiseuille–Benard channel flow, where the Darcy–Brinkman model is used. Irreversibilities due to heat transfer and ... -
Thermal Dispersion in Finite Medium Under Periodic Surface Disturbance Using Dual Phase Lag Model
(The American Society of Mechanical Engineers (ASME), 2016)Transient heat conduction in finite thin films subjected to timevarying surface heat flux incidences at both boundaries and internal heat generation is investigated via the dualphaselag (DPL) hyperbolic model. Analytical ... -
Modeling of Temperature Cycles Induced by Pico and Nanosecond Laser Pulses in Zinc Oxide and Molybdenum Thin Films
(The American Society of Mechanical Engineers (ASME), 2016)The aim of this paper is to study the benefits of applying ultrashort pulsed lasers over nanosecond pulsed lasers for selective (i.e., superficial) heat treatment of materials in general and for selective heat treatment ... -
Thermal Hydraulic Performance of SiC Water and Al2O3 Water Nanofluids in the Minichannel
(The American Society of Mechanical Engineers (ASME), 2016)The singlephase flow and heat transfer behaviors of SiC and Al2O3 nanoparticles dispersed in water were studied experimentally in a multiport minichannel flat tube (MMFT). The volume concentrations of the two nanofluids ... -
Heat Transfer Impact of Synthetic Jets for Air Cooled Array of Fins
(The American Society of Mechanical Engineers (ASME), 2016)Free convection air cooling from a vertically placed heat sink is enhanced by upward concurrent pulsated air flow generated by mesoscale synthetic jets. The cooling enhancement is experimentally studied. An enhancement ... -
Lord Kelvin and Weaire–Phelan Foam Models: Heat Transfer and Pressure Drop
(The American Society of Mechanical Engineers (ASME), 2016)The knowledge of thermal transport characteristics is of primary importance in the application of foams. The thermal characteristics of a foam heavily depend on its microstructure and, therefore, have to be investigated ... -
Mechanistic Considerations for Enhancing Flow Boiling Heat Transfer in Microchannels
(The American Society of Mechanical Engineers (ASME), 2016)Research efforts on flow boiling in microchannels were focused on stabilizing the flow during the early part of the last decade. After achieving that goal through inlet restrictors and distributed nucleation sites, the ... -
Critical Biot Number of a Periodic Array of Rectangular Fins
(The American Society of Mechanical Engineers (ASME), 2016)We consider the heat transfer problem associated with a periodic array of rectangular fins subjected to convection heat transfer with a uniform heat transfer coefficient. Our analysis differs from the classical approach ... -
Interactions of Separation Bubble With Oncoming Wakes by Large Eddy Simulation
(The American Society of Mechanical Engineers (ASME), 2016)The unsteady flow physics and heat transfer characteristics due to interactions of periodic passing wakes with a separated boundary layer are studied using largeeddy simulation (LES). A series of airfoils of constant ... -
Convective Heat Transfer in a High Aspect Ratio Minichannel Heated on One Side
(The American Society of Mechanical Engineers (ASME), 2016)Experimental results are presented for singlephase heat transfer in a narrow rectangular minichannel heated on one side. The aspect ratio and gap thickness of the test channel were 29:1 and 1.96 mm, respectively. Friction ... -
Computational Study of Saturated Flow Boiling Within a Microchannel in the Slug Flow Regime
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents a fundamental study of the flow dynamics and heat transfer induced by a slug flow under saturated flow boiling in a circular microchannel. Numerical simulations are carried out by utilizing the commercial ...