Showing papers in "International Journal of Heat and Mass Transfer in 2023"

TL;DR: In this article , a 3D numerical model is established and verified by visualization experiment to evaluate the effect of fin and metal foam on the internal melting process compared with pure paraffin structure.

TL;DR: In this paper , a review of surface modification methods and heat transfer mechanisms commonly used in boiling is presented, including macro and micro scales, and the empirical correlation formulas for predicting the detach diameter and detach frequency of bubbles are evaluated.

TL;DR: In this article , the thermal properties of different encapsulation methods of phase change materials (PCMs) are summarised and compared, and the applicable thermal properties for various encapsulation techniques and encapsulation materials such as particle diameter, enthalpy, encapsulation efficiency and thermal cycling times are reviewed.

TL;DR: In this paper , a phase change heat storage/release unit and a visual test system were designed to study the influence of different heating and cooling temperatures upon thermal cycle of melting and solidification, a series of experiments were carried out.

TL;DR: In this article , a new louvered corner-curved winglet tape (LCBT) was proposed for improving performance of a uniform heat-flux tube equipped with a V-shaped LCBT arranged by V-tip in downstream direction with three baffle pitch ratios (P R = 1-2) and six louver angles (θ = 0-90°) for a fixed attack angle (α) of 30° and baffle height ratio (B R = 0.25).

TL;DR: In this article , a systematical study on the dynamic frosting characteristics on the edge zone of a horizontal copper plate under forced convection was conducted, and the results showed that the air velocity effect and edge effect on droplet condensation, frozen and frost layer growth characteristics were significant.

TL;DR: In this paper , a modified Euler-Lagrange-Euler model was proposed to explore the internal flow mechanism within supersonic separators, and the mutual heat and mass transfer of the gaseous phase, droplets, and liquid film were simulated in su-personic flows.

TL;DR: In this article , the melting performance of a triplex-tube latent heat thermal energy storage unit (T-LHTESU) in a phase change heat storage system is studied, and the rotation mechanism is applied to the unit.

TL;DR: In this article , a novel equilibrium ablation and thermal response model for NASA's Phenolic Impregnated Carbon Ablator (PICA) is presented, which accounts for the effect of NuSil, a silicone overcoat applied as contamination control during assembly, test and launch operations for both the Mars Science Laboratory and the Mars 2020 heatshields.

TL;DR: In this article , a comprehensive review of phonon thermal transport in GaN and GaN HEMTs is presented, including non-equilibrium transport of electrons and phonons in the heat generation process and thermal conductivity, heat spreading, and interfacial thermal transport.

TL;DR: In this article , a differently baffled-nanofluid-based photovoltaic thermal module is proposed and numerically evaluated from both an energy and an exergy perspective, and the overall performance of the suggested system from both energy and exergy in order to choose the ideal system was assessed about several variables, such as flow rate, radiation intensity, volume fraction and wind speed.

TL;DR: In this article , a comprehensive hybrid transient CFD-thermal resistance model was proposed to predict the dynamic behavior of an automobile thermoelectric generator (ATEG) system.

TL;DR: In this paper , a methodology is proposed to calculate the thermal conductivity of unsaturated soils based on microscopy images of soil specimens, and the meso-structures that consist of the different phases are reconstructed in a finite-element model based on the identified characteristics.

TL;DR: In this paper , the authors investigated how a heavy rainfall on one exit affects the fire burning and the smoke spread in tunnels and found that heavy rainfall can induce a longitudinal airflow inside the tunnel, and the induced airflow is caused by the increased pressure at the rainfall exit.

TL;DR: In this article , the authors investigated the characteristics of irreversible energy loss caused by cavitation flow in centrifugal pump and employed the entropy production theory with computational fluid dynamics (CFD) to analyze the relationship between flow field details of Cavitation flow and irreversible flow loss.

TL;DR: In this article , the phase transition and heat transfer dynamics of a confined multiple jet impinging system with phase change-packed bed (PCM-PB) installed sub-system under magnetic field effects are numerically assessed during hybrid nanoliquid convection.

TL;DR: In this paper , the thermal performance of a microchannel heat sink with nanofluid is evaluated. And the results indicated that the maximum suppression value of the thermal resistance attained by employing the nanophotonics is 12.61%.

TL;DR: In this paper , a 3D model of the hybrid mechanical draft wet cooling tower (hybrid MCT) is presented, and the plume, water saving, and cooling capacity of hybrid MCT are discussed.

TL;DR: In this paper , the effect of magnetic field on non-Newtonian melting performance of nano-enhanced phase change material (NEPCM) composited with metal foam was numerically studied.

TL;DR: In this paper , the grey relational based Taguchi analysis is conducted to evaluate the effect of influential factors on heat transfer performances of direct oil spray cooling system for electric vehicle driving motor.

TL;DR: In this paper , a numerical analysis on enhancing the melting process of phase change material (PCM) in a rectangular enclosure using flanged fins (T-shaped) is presented, and various cases based on fin length ratio (Lu/Ld) and material are examined with no-fin PCM enclosure.

TL;DR: In this article , the effect of fractional order, relaxation time, and characteristic length on the inverse quality factor of a micro-plate is analyzed, and an analytical expression for the size-dependent damping of a circular microplate is given.

TL;DR: In this paper , a thermal energy management method based on heat pipe-assisted hybrid foam/paraffin phase change material (PCM) and thermoelectric power generator (TEG) was proposed for passive cooling, heat storage and energy harvest.

TL;DR: In this paper , the feasibility of using porous fins to simultaneously improve the thermal and hydraulic performances of the straight plate-fin microchannel heat sinks was evaluated. And the results showed that the porous-fin channels outperform the solid-fin ones at small channel heights, while the low effective thermal conductivity of porous fins results in a weak vertical thermal diffusion.

TL;DR: In this article , an energy harvesting system from charged conical nanopore with coupled salinity and temperature gradient is proposed, and the obtained maximum power increases first and then decreases as the concentration difference increases.

TL;DR: In this article , the saturated flow boiling heat transfer coefficient (HTC) and frictional pressure drop (PDf) features of R290 in a brazed plate heat exchanger embedded with offset strip fins with an offset length of 2 mm, fin thickness of 0.3 mm, and fin height of two mm.

TL;DR: In this article , the authors proposed a bionic flow channel based on the internal structure of the nautilus and established a three-dimensional (3D) single-phase isothermal CFD model for a multi-physical field numerical simulation.

TL;DR: In this paper , an iterative DNS-DNN-RANS framework is proposed to establish explicit closures for turbulent momentum diffusion and turbulent thermal diffusion of turbulent heat transfer at supercritical pressure.

TL;DR: In this article , the authors presented an experimental investigation of the heat transfer characteristics of CO2 based on natural circulation, and developed a deterioration criterion and a heat transfer correlation suitable for natural circulation of supercritical CO2.

TL;DR: In this article , the phase separation performance of 2-Butoxyethanol/water solutions in a slit cavity was visually investigated, and the effect of driven force was discussed on the temperature distribution, motion of boundaries and phase separation rate.