A numerical study is performed to demonstrate the thermomagnetic convection of air in a side-wall heated enclosure under constant gravity and time-periodic magnetizing force formed by current with sinusoidal waveform. Two cases have been considered: electric coil is located at the right side of the enclosure in case 1, and in case 2 the electric coil is below the enclosure. The spectral element method

The Menter Shear Stress (SST) turbulence model has been added to FEARCE, a Los Alamos National Laboratory Finite Element reactive flow code for solution of fluid-structure interaction, and turbulent reactive flow with multiphases. The SST model is an addition to the Reynolds Averaged Navier-Stokes (RANS) model of Wilcox (k- ω) in FEARCE where the primary focus of the method is the application of unsteady

In view of the heat transfer deterioration of supercritical CO2 under the condition of low mass flow rate and high heat flux, the influence of Body-Centred Cubic (BCC) lattice, Kagome lattice and Pin-fin structure on the heat transfer of supercritical CO2 in rectangular channels were investigated in this article. The results showed that all the three structures can generate arch-shaped vortices near

In this study, thermal resistance of a double-layer micro-channel heat sink (DL-MCHS) with different ratio of upper and bottom channel heights in outlet (α=HU/HB) and the angle of channel inclination (θ), was investigated numerically. The advantage of DL-MCHS in reducing thermal resistance compared with single-layer micro-channel heat sink (SL-MCHS) was quantitatively demonstrated. It was confirmed

Abstract Steam is a common medium in thermal engineering. When it flows through a throttling element, the aerodynamic noise may occur due to the disturbance. In this investigation, superheated steam flowing through a Venturi tube, one of the main parts in a temperature and pressure regulation valve, at different thermal conditions is studied to analyze to effects of heat transfer on the acoustic power

The present article investigates the melting process of aluminum foam/paraffin composite with low porosity by using experimental and numerical methods. Three composites with porosities 67%, 75%, and 84% are compared in terms of temperature variation, interface evolution, and total melting time. The experimental results indicate that the effect of thermal conduction and thermal convection on the melting

The heat transfer on the trailing edge plays a very important role in cooling the turbine blade of an aircraft engine. The goal of the present study is to examine the heat transfer of four wedge-shaped channels, which are simplified models of the trailing edge, undergoing rotation with different combinations of pin fins, ribs, and Kagome lattices for Re = 15,000. The numerical simulations are compared

The manifold microchannel (MMC) heat sink has become the most popular one among emerging technologies for high heat flux thermal management because of its high surface-to-volume ratio. Even though numerous numerical studies have been performed for the single-phase flow in the MMC heat sink, researches on two-phase flow boiling/condensation in this type of microchannel is seldomly reported because of

Due to the single-side heating on the rectangular channel, the coolant faces a serious thermal stratification problem, and thus the heat transfer performance is reduced. To effectively improve flow and heat transfer characteristics, and weaken nonuniform distribution problem, a new cooling structure with combining fin and spherical convexity is built in this paper. The study results indicate that the

In this article, a multilayer artificial neural network (ANN) identification model is developed to simultaneously identify the thermal conductivity and the effective absorption coefficient of semitransparent materials from flash-type experimental measurements. Firstly, the ANN is trained by means of data generated by a 2-D axisymmetric heat transfer model whose radiative part is treated via the P1