Showing papers in "International Journal of Thermal Sciences in 2019"

TL;DR: In this paper, a thermal management system (TMS) was introduced for pouch lithium-ion battery (LIB) modules with a focus on stressful conditions, which exhibits excellent thermal performance for the battery pack, especially for a longer working time at an appropriate temperature range.

TL;DR: In this paper, the authors developed a criterion to predict the onset of heat transfer deterioration (HTD) for supercritical CO2 heat transfer by assuming supercritical pseudo-boiling.

TL;DR: In this article, a numerical analysis has been performed to investigate the flow structure and thermal hydraulic performance of turbulent flow through circular tube equipped with twisted tapes with different cut shapes, and the results show that both of heat transfer and pressure drop are dependent on the cut ratio.

TL;DR: In this paper, the steady flow of incompressible, viscous, conducting and optically thin fluid over a vertical plate with magnetohydrodynamic mixed convection, thermal radiation and viscous dissipation was investigated.

TL;DR: In this paper, five ML frameworks are introduced including physics-separated ML (PSML), physics-evaluated ML (PEML or Type II ML), physicsintegrated ML(PIML) and physics-recovered ML (PRML or Type IV ML) for thermal fluid simulation.

TL;DR: In this paper, an improved design of microchannel heat sinks possessing a combination of high thermal performance and low pressure drop is proposed, where the superiority of double-layered concept and the advantage of porous-ribs design are taken into account.

TL;DR: In this article, the effect of perforated twisted tapes with alternate axis (PATT), PTT and regular twisted tapes (TT) with twist ratios (TR) of 3,4 and 5 were compared by experimental investigation in a circular tube under constant heat flux condition.

TL;DR: In this paper, the conical ring inserts were applied through three configurations of; convergent conical rings (CR), convergent divergences (CDR) and divergent conicals (DR), each arrangement with diameter ratios of (d/D) = 0.5, 0.6, and 0.7.

TL;DR: In this article, a physics-based computational fluid dynamics model was developed to simulate selective laser melting (SLM) process, which is able to simulate the fluid flow and heat transfer of keyhole-mode laser melting process.

TL;DR: In this article, an enthalpy-based multiple-relaxation-time (MRT) lattice Boltzmann method was used to investigate the PCM charging process enhanced by combination of nanoparticles and fins.

TL;DR: In this article, the effect of delta winglet vortex generator (DWVG) pairs on thermal and flow behaviors in a circular tube for Reynolds numbers (Re) range of 5000-25000.

TL;DR: In this paper, a new class of lattice structures (Rhombi-Octet unit cells) for single-phase forced convection cooling is presented. But the lattice structure is not suitable for the use of a single phase cooling system.

TL;DR: In this paper, a numerical study was performed to investigate the thermal-hydraulic performance of different microchannel heat sink (MCHS) designs for cooling channels in a lithium-ion battery including various geometric modifications.

TL;DR: In this article, the effect of tunnel slope on temperature distributions in the shaft and tunnel, smoke back-layering length and tunnel inlet air velocity were specifically focused, and the maximum ceiling gas temperatures were presented in the downstream of fire axis for all slopes (5% − 25%).

TL;DR: In this paper, the influence of particle size, volume fraction of particles, coating thickness, and different substrate reflectances on the spectral radiative characteristics of the radiative-cooling coating was considered.

TL;DR: In this article, the authors explore the heat and fluid flow characteristics using direct numerical simulations of a periodic unit-cell and compare them with stochastic foam experimental data, showing that octet truss lattice geometry is more suitable for tailored multifunctional heat sinks and exchangers.

TL;DR: In this paper, the authors studied the overall smoke control of natural ventilation systems with vertical shafts during fires in a common road tunnel by numerical modeling and found that the total smoke spread length on both sides of fire source is closely independent of the heat release rate and longitudinal fire locations.

TL;DR: In this paper, a three-dimensional fluid-solid conjugate model is developed to investigate the heat transfer performance of the left-right and up-down wavy microchannel heat sinks.

TL;DR: In this paper, mixed convection heat transfer in a differentially heated cavity with two rotating cylinders was studied numerically for various pertinent parameters such as Richardson number, Reynolds number, non-dimensional rotation speed of the cylinder, and the location of the cylinders.

TL;DR: In this article, a combination of vortex generators and dimples on a microchannel heat sink is proposed to improve the heat transfer performance on a cooling surface with a constant heat flux of 100 W/cm2.

TL;DR: In this paper, an experimental investigation of the pool boiling heat transfer in a nanofluid composed of deionized (DI) water and silicon dioxide (SiO2) nanoparticles with added surfactants (Ps20, CTAB, SLS) was conducted under atmospheric pressure conditions.

TL;DR: In this paper, a new mixed condensation model based on the wall condensation and capillary condensation in the membrane has been proposed and the results obtained from the model are compared with the previous numerical and experimental data.

TL;DR: In this article, concave and convex curved delta winglet VGs in a channel of plate heat exchanger under laminar flow are studied and compared with the normal plane delta winglets to optimize the shape of VGs.

TL;DR: In this paper, a numerical investigation has been taken up to assess the efficacy of a design innovation for rectangular microchannel heat sink by applying the concepts of maximization of thermal performance and minimization of entropy generation.

TL;DR: Wang et al. as mentioned in this paper investigated the drying shrinkage-deformation mechanism of apple slices during process of heat and mass transfer, and the maximum relative errors of simulated value and experimental value were less than 10%.

TL;DR: In this article, numerical analysis of fluid flow and heat transfer in a trapezoidal microchannel was done using finite volume method for the range of Reynolds number 96 to 720, and three-dimensional simulations were carried out at constant heat flux and different pressure drop conditions to determine the optimum heat flux distributions across the microchannels.

TL;DR: In this article, a mathematical model has been derived, validated, and implemented to simulate the effect of the coolant's temperature, the spacing between two freeze pipes, and the seepage temperature on the closure time and the shape of the frozen body.

TL;DR: In this article, the effects of the Rayleigh numbers, annulus width, fins geometrical dimensions, fins numbers, fins shapes and fin arrangements on the heat transfer, fluid flow and effective thermal conductivity of the annulus were investigated.

TL;DR: In this article, a theoretical analysis of heat and mass transfer in the microchannels partially filled with porous materials and used in thermos-chemical microreactors is presented, where a first order catalytic chemical reaction is considered on the internal surfaces of a parallel-plates microchannel.

TL;DR: In this paper, two novel annular microchannel heat sink designs are proposed to improve the flow distribution and substrate temperature uniformity of the micro channel heat sink, which has been widely used in the micro-channel reactors, electric chip cooling and various type fuel cells.