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Numerical investigation on thermal-hydraulic performance of leeward cut annular finned tubes in crossflow heat exchangers: An insight on fin material saving Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-26 Mohit Raje, Amit Kumar Dhiman
The objective of the current study is to analyse the hydro-thermal characteristics of leeward cut fins with various trimming values and finalise a specific fin that benefits by maximum material saving and negligible compromise in heat transfer. The leeward section of a fin is cut in two ways: angular and chordwise. For angular cutting, four different angles (15°, 30°, 60°, and 90°) are considered,
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The utilization of novel jet extension designs in multi-jet impingement for crossflow mitigation and thermal efficiency enhancement Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-24 Bugra Sarper
The aim of this study is to mitigate the distorting effect of crossflow on jet flow and to enhance heat transfer performance in multi-jet impingement heat transfer. To accomplish this objective, novel jet extension designs are proposed: a design with uniform jet extension, a design with linear jet extension in the streamwise direction, a design featuring an initial increase followed by a decrease,
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Coordinated multi-band stealth based on phase change materials Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-23 Tianyi Wang, Boshi Wang, Lin Li, Haotuo Liu, Kaihua Zhang, Xiaohu Wu, Kun Yu
With the integrated application of multiple detection technologies, multi-band compatible stealth is crucial to improve the counter-detection capability of targets. However, there are still significant challenges in achieving stealth that is compatible with different bands. This paper presents a wavelength-selective emitter with a structure consisting of a layer composed of a high-temperature-resistant
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Experimental investigation on flame characteristics in a linear array of dual spill fire Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-23 Yuntao Li, Ling Yang, Chaoke Shi, Yueyang Li, Cong Yan, Qi Jing, Laibin Zhang
In the process of petroleum production and transportation, a porous leakage accident can easily lead to combustion behaviors such as fire merging, resulting in more severe consequences. This study explores the combustion characteristics of merging spill fires through experimental investigations, incorporating dual leakage holes with varying spacing to examine their impact on the combustion process
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Numerical analysis of radiative transfer and prediction of spectral properties for combined material composed of nickel foam and TiO2 nanofluid Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-22 Bo Liu, Jie Feng, Zi-Ang Wang, Guo-Hua Shi
Accurate spectral radiative transfer simulation and property prediction are basic for improving the performance of combined collecting material in the field of solar photothermal utilization. In this work, the combined material composed of open-cell nickel foam and TiO nanofluid is proposed, and the various multi-scale structures are modeled. The realistic structures of nickel foams with different
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A layered metastructure based on brewster angle for Janus ultra-wideband tunable directional thermal radiation Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-20 Hao-Ran Xu, Zhao Tang, Bao-Fei Wan, Hai-Feng Zhang
In this proposal, we introduce a Janus layered metastructure (JLM) composed of three distinct structures. The first and third structures (S1 and S3) are designed based on Brewster and Bragg reflection laws, which enable the selection of a specific incident angle of electromagnetic waves (EMWs) by adjusting the refractive indices of the materials. By matching the thickness of the dielectric layer to
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A full-flow-range drift-flux model for adiabatic and boiling two-phase flows in vertical narrow rectangular flow channels Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-20 Xiuzhong Shen, Toshihiro Yamamoto, Ken Nakajima, Takashi Hibiki
This study has reviewed the past research for adiabatic and boiling GLTP (gas-liquid two-phase) flows in VNR (vertical narrow rectangular) flow channels. 1758 void fraction experimental data have been collected from 13 available databases of various researchers. The underlying distribution parameter and drift velocity features have been obtained by analyzing the experimentally-measured data in the
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Modeling the pyrolysis of 3D-printed tannin-based composites – A first approach Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-18 Pauline Blyweert, Vincent Nicolas, Vanessa Fierro, Alain Celzard
A two-dimensional axisymmetric finite element model of the pyrolysis of 3D-printed tannin-based composite was developed using COMSOL Multiphyics. The thermal degradation of such bio-based composites involves the interaction, in a porous medium, of heat, mass and momentum transfer with chemical reactions. Heat is transported by conduction and convection, and mass transfer is driven by pressure and concentration
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Pore-scale conjugate heat transfer analysis of turbulent flow over stochastic open-cell metal foams Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-18 W. Alruwaili, M. Jadidi, A. Keshmiri, Y. Mahmoudi
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Pool boiling performance for GaldenR HT 55 subject to smooth, pin fin, and sintered pin fin heat sink Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-17 Yohanne Lin, Tz-Hau Wang, Chi-Chuan Wang
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Enhancement of heat transfer using conical fins for electronic cooling and their design optimization for maximum thermal regulation using ANN assisted NSGA II Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-16 Karan Dhuper, Rajesh Akula, Siddhartha Duttagupta, Lalit Kumar
In this investigation, the hydrothermal performance of Microchannel Heat Sink (MCHS) augmented with microfin is studied under the condition of forced convection. Microfins are used as flow disruptive structures which lead to redevelopment of thermal boundary layer and improved mixing of fluid flow. A comparative analysis of MCHS with different fin configurations (conical, circular, square and triangular)
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Temperature-dependent in-plane thermal conductivity of SrTiO3 membranes enhanced by surface phonon polaritons Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-16 Tao Cheng, Huanhuan Zhao, Linhua Liu, Jia-Yue Yang
Surface phonon polaritons (SPhPs) enable unique surface heat dissipation on nanoscale polarized membranes, countering reduced lattice thermal conductivity () from decreased membrane thickness () and increased temperature (). SrTiO, a polar perovskite material, supports SPhPs across a wide Reststrahlen band linked to its substantial polarizability. However, limited studies explore SPhPs' role in SrTiO
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Topology optimization in cooling moving heat sources for enhanced precision of machine tool feed drive systems Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-16 Shuang Zeng, Jialan Liu, Chi Ma
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Numerical investigation of coupled heat transfer and flow characteristics in helical coil heat exchanger for mine water waste heat recovery Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-13 Yiran Duan, Xiaoyan Zhang, Ziyi Han, Qingjiang Liu, Xingge Li, Linchuan Li
To efficiently recover waste heat from mine water, this study numerically investigates the flow and heat transfer performance of a tube-shell coupled helical coil heat exchanger (HCHE), under high Reynolds number conditions. The effects of inlet water temperature, mass flow rate (), tube diameter (), and helix pitch () on the tube side, shell side, and overall performance are analyzed. Performance
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Thermal response of encapsulated nanoscale phase change materials with crosslink: A molecular dynamics study Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-13 Kai Qi, Xinjian Liu, Zhonghao Rao
Crosslink plays a key role in improving the thermal and mechanical stability of encapsulated phase change materials (EPCM). In this paper, molecular models of EPCM with different crosslinked density (non-crosslinked, 20 %, 40 %, 60 %, and 80 %) were constructed and then the molecular dynamics method was employed to investigate the thermal response characteristics. Specifically, the local structural
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Comparison analysis of entropy and entransy under various conditions of a hollow fiber membrane humidifier (HFMH) Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-13 Nan-Feng Li, Si-Min Huang, Cai-Hang Liang
The hollow fiber membrane heat and moisture transfer model is converted equivalently into a series of parallel-plate membranes stacked along the -axis to simplify the model. A detailed modeling process is described based on the concept of finite difference method. The comparison of experimental values with calculated values ensures the validity of the model. Subsequently, an entransy dissipation model
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Temperature field analysis and equal-amplitude temperature rise constraint current control method under open-circuit fault-tolerant operation for five-phase permanent magnet motor Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-12 Siyuan Jiang, Mengzhen Gao, Junheng Niu, Haichao Feng, Liwang Ai, Xiaozhuo Xu
The phase redundancy and freedom of the five-phase permanent magnet motor (FPPMM) enhance the reliability of the motor system. However, the temperature rise and torque reduction issues of the motor during open-circuit fault operation need to be further studied. In order to study the temperature distribution characteristics and the output capability of the motor under fault operation subject to temperature
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Experimental investigation on the improvement of film cooling efficiency with a V-shaped micro-vortex generator Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-12 Wei Tian, Kuan Zheng, Xingyu Dai
An experimental investigation was performed to assess the impact of a V-shaped micro-vortex generator (VG) on film cooling (FC) efficiency. The study involves injecting coolant gas from a downstream inclined cylindrical hole, while measuring flow characteristics and film cooling efficiency using particle image velocimetry (PIV) and pressure-sensitive paint (PSP), respectively. The width and streamwise
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Experimental investigation of the Reynolds analogy for high Prandtl number fluid with repeated rib roughness Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-12 Dong-Hyuk Park, Bum-Jin Chung
Reynolds analogy describes the relationship between friction (/2) and heat transfer () owing to their superficial resemblance. However, Reynolds analogy is limited to simple geometries with a Prandtl number () close to unity. To extend Reynolds analogy, we measured the and /2 simultaneously using a high Pr fluid in duct flow in vertical duct flow with repeated rib roughness. The experiments were performed
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Exploring the relationship between heat transfer and pseudo-boiling for trans/supercritical real-fluid injection Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-11 Jie Ma, Hongsheng Liu, Maozhao Xie
The trans/supercritical injection of cryogenic fluids is extensively used in practical applications. However, the corresponding heat transfer and jet turbulence characteristics are unclear. In this study, based on the thermal disintegration mechanism, an accurate non-ideal thermophysical framework was applied to analyze the effects of wall heat transfer and turbulent Prandtl number (Pr) on the jet
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Interfacial analysis and development of condensation models with OpenFOAM Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-11 Shuwen Yu, Ning Cheng, Changhong Peng
Interfacial mass and heat transfer are crucial factors in phase-change models. In this study, based on the open source toolbox OpenFOAM, an extended volume-of-fluid (VOF) solver with phase transition inserted is utilized to study three typical phase-change models (Lee model, energy balance model, and Rattner model). Through simulations and analysis of phase-change problems, we found that these three
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Evaporative cooling enhanced by fibrovascular capillary structures Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-10 Zhanxiao Kang, Amir Shahzad, Jintu Fan
Evaporation is a robust approach to removing heat from the human body, whereas evaporative cooling garments generally block the vapor diffusion from the skin resulting in discomfort. Inspired by the intensive evaporation of leaf stomata, some hydrophilic fibrovascular capillary structures incorporated with hydrophobic islands were proposed in this study, where the hydrophilic structures were designed
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‘Temperature jump’ mechanism of silicon carbide based thermal protection material in arc-jet flow Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-09 Yuanjian Yang, Songhe Zhang, Lingwei Yang, Wanqing Luo, Haojun Ma, Li Jing, Weihua Xie
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Experimental investigation of flame spread interaction and heat transfer over inclined parallel twin wires under different separation distances Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-09 Yunji Gao, Peiyao Zhang, Zhengyuan Yang, Hanwen Guo, Feng Guo, Hui Zhu, Liang Gong, Yuchun Zhang
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Influence of thermal conductivity on the predicted temperature fields in welding of steels Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-08 Jiamin Sun, Klaus Dilger
In numerical welding simulation, to precisely predict residual stresses (RS) and deflections in steel components induced by fusion welding, the primary precondition is to accurately assess the welding temperature field. In thermal analysis, the applied thermal conductivity () of material plays an essential role in the calculation accuracy of welding temperature field. Nevertheless, it is still unclear
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Experimental study of a high-capacity dual compensation chamber loop heat pipe at different orientations Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-08 Huanfa Wang, Guiping Lin, Yuandong Guo, Wenzhao Zhao, Lizhan Bai
Dual compensation chamber loop heat pipe (DCCLHP) is a promising technology for future avionics cooling. In this work, the effect of orientations on the steady state and startup performance of a DCCLHP with kW class heat transfer capacity was investigated experimentally. Experimental results show that for high capacity DCCLHP, the variation of condenser performance at different orientations is a decisive
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Thermodynamic analysis of the effect of mass transfer on a real building wall efficiency under climatic transient conditions Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-08 Julien Berger, Jean-Henry Ferrasse, Suelen Gasparin, Olivier Le Metayer, Benjamin Kadoch
Within the environmental context, designing energy efficient buildings is crucial. Standard performance indicators evaluate the quantity of energy going through the wall. Such indicator considers the energy balance of the wall, the first thermodynamic law. However, the main drawback of such approach is that it does not qualify the energy quality, which can be done by the second thermodynamic law. This
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A vasculature based nanocryosurgical model for tumor destruction Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-06 D.K. Verma, P. Rath, A. Bhattacharya
The vascular model built on porous media approach is a more realistic representation of biological tissue. A vasculature system based axisymmetric cryosurgical model is proposed here for cryosurgery of lung tumor based on the freezing of the vascular region of the biological tissue. A two-temperature model is developed based on the porous medium approach considering the thermal non-equilibrium between
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Investigation of droplet boiling on superhydrophilic CuO multiscale hierarchical structured surfaces Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-06 Pradyumna Kodancha, Siddhartha Tripathi, Pradeep Kumar Sow, Vadiraj Hemadri
This work presents the experimental investigation of droplet boiling characteristics on superhydrophilic surfaces. These surfaces are prepared on a copper substrate, and the boiling characteristics are studied and compared with the bare copper surface. Two types of superhydrophilic surfaces exhibiting needle-like (CuO-1) and sheet-like (CuO-2) nanostructures are prepared by the chemical etching oxidation
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Fractal cube-induced homogenisation of dual concentration microchannel flow in transitional Re: Lattice Boltzmann modelling Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-06 Lit Kean Chai, Chin Vern Yeoh, Ean Hin Ooi, Ji Jinn Foo
To date, the mixing of multiple species within microchannels relies primarily on infamously slow diffusive processes. Hence, the present study aims to numerically investigate the fundamental transportation and interaction of a dual-concentration fluid by employing fluid flow perturbations induced by a single instance of a 3D fractal geometry. In particular, a D3Q19 lattice-Boltzmann approach is employed
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Experimental investigations on cooling characteristics of different trailing-edge cutback geometries Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-06 Jun Liu, Jiajie Liu, Pei Wang, Qiang Du, Pengfei Wang, Zhiguo Wang, Xin Shen
One important method for enhancing the performance of modern engines is to increase the turbine inlet temperature. Due to the high velocity near the throat, the heat transfer to the blade trailing edge is high, particularly on the pressure side near the trailing edge. Therefore, the design methodology for cooling structures becomes critical for the thinner trailing edge compared to other parts of the
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Nanoscale study on enhanced interfacial heat transfer in confined space with spontaneously formed diol molecular bridge Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-06 Fuquan Luo, Yunxie Huang, Runkeng Liu, Huiying Wu, Zhenyu Liu
Nanoconfinement technology is widely used in thermal energy storage application for alleviating energy shortage crisis. In this work, the nanoconfinement effect of diol molecules on the thermal transport characteristic between two hydrophilic silica interfaces was studied based on the molecular dynamics simulation. The results show that nanoconfinement can induce spontaneously formed diol molecular
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Performance of power dissipation on semiconductor module for different configuration of heat SINK with thermal pad Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-06 Muhammad Razin Salim, Aizat Abas, Kah Hei Lim, Mohamad Nazir Abdullah
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Temperature uniformity analysis and multi-objective optimization of the microchannel heat sink with cavities under longitudinal vortex flow Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-06 Junhao Liu, Zhenfei Feng, Zhenzhou Li, Shanpan Liang, Jiachang Nie, Ziyu Wang, Jinxin Zhang, Fangwen Guo, Ding Yuan
With the development of electronic devices toward a more centralized direction, there is an urgent need to introduce new technologies in the microchannel heat sink to address thermal deformation or failure caused by uneven temperature distribution. Therefore, microchannels with longitudinal vortex generators (LVGs) and different shapes of cavity structures combination are designed innovatively to address
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Experimental investigation of the oscillation threshold to limit state operation of a single branch pulsating heat pipe Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-06 Utsav Bhardwaj, Rabindra Kumar, Shyama Prasad Das
The study investigates the characteristics of oscillations and associated thermo-hydrodynamic phenomena for startup, limit state, and intermediate transitional behavior of a pulsating heat pipe (PHP) with the help of its single branch. Experiments are performed on a transparent single branch PHP (SBPHP) at different orientations, evaporator and condenser section temperatures using n-pentane as the
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Multiscale topology optimization of cellular structures with high thermal conductivity and large convective surface area Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-05 Mingzhe Huang, Wei Sha, Mi Xiao, Liang Gao, Xiliang Liu, Yihui Wang
Cellular structures have excellent thermal performance due to their high specific surface areas and porosities. This paper proposes a multiscale topology optimization (MTO) method of cellular structures with high thermal conductivity and large convective surface area, which enables them to have rapid cooling capability. In the MTO of a cellular structure, the triply periodic minimal surface (TPMS)
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Effects of one-side confinement and current on heat transfer mechanisms over single electrical wire flame spread behaviors Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-04 Xinjie Huang, Meng Zhang, Hailong Ding, Peng Xu, Xinyi Zhang, Xinyi Li, Miaomiao Wang, Pengyuan Zhang
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Film cooling effect of upstream jump coolant on turbine endwall with combustor-turbine interface misalignment Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-03 Kaiyuan Zhang, Zhiyu Li, Weidong Shao, Zhigang Li, Jun Li
The investigation of jump cooling performance on turbine endwall independently causes its actual cooling effectiveness to deviate from the design values. In this paper, the endwall jump cooling structure with combustor-turbine interface cavity and combustor liners is modeled. Taking the realistic combustor-turbine interface features into account, the effect of jump coolant on turbine endwall film cooling
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Heat transfer measurements on a flat plate and cylinders at high velocity conditions: Comparison of calculation models with infrared thermography Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-03 Woojun Kim, Jin Young Jeong, Young Jun Kang, Hyeok Je Kim, Gi Mun Kim, Suhyeon Park, Jae Su Kwak
In this study, various heat transfer measurement models using infrared (IR) thermography were applied to a flat plate and cylinders to examine the accuracy and suitability of the measurements in a transonic blow-down test facility recently developed at Korea Aerospace University. Experiments were performed under three inlet velocity conditions for the flat plate, and for the cylinders, two diameters
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Non-equilibrium thermal transport study in steady state GaN MISHEMT channel layer based on electron Monte Carlo and phonon BTE Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-03 Guofu Chen, Jiao Chen, Zhulin Jiang, Zhaoliang Wang
An electro-thermal coupling simulator for GaN devices based on electron Monte Carlo (e-MC) simulations is established. Taking GaN Metal Insulator Semiconductor High Electron Mobility Transistor (MISHEMT) as example, the non-equilibrium thermal transport processes of self-heating effect in the channel layer are studied. This simulator is mainly coupled by e-MC and the phonon Boltzmann transport equation
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Investigation of experimental mice husbandry microenvironment and animal health in individual ventilated cage (IVC) Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-02 Xiang Chen, Guangcai Gong, Mengjun Chen, Yuxin Wang, Yuting Huang
This work investigates the husbandry microenvironment and health status of experimental mice to help create a suitable husbandry microenvironment for experimental animals, with the aim of ensuring the quality and animal welfare of experimental mice through a suitable husbandry microenvironment. Experimental measurements and computational fluid dynamics (CFD) are used to analyze the husbandry microenvironment
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Multi-objective hydrothermal performance optimization of a microchannel heat sink equipped with delta winglet vortex generators using NSGA-II genetic algorithm Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-04-02 Fawaz Bukht Majmader, Md. Jahid Hasan
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Ultra-broadband and wide-angle plasmonic absorber based on all-dielectric gallium arsenide pyramid nanostructure for full solar radiation spectrum range Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-31 Ling Wu, Lingling Yang, Xinwang Zhu, Bin Cai, Yongzhi Cheng
Broadband and plasmonic absorbers (PAs) are key components for numerous applications in the fields of energy harvesting, thermal photonics, optoelectronic devices, and enhanced spectroscopy. In this work, we propose a simple and cost-effective metamaterial plasmonic absorber (MPA) design based on an all-dielectric GaAs pyramid nanostructure for the full solar radiation spectrum range. Simulation results
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Machine learning backpropagation network analysis of permeability, Forchheimer coefficient, and effective thermal conductivity of macroporous foam–fluid systems Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-30 Abdulrazak Jinadu Otaru, Manase Auta
Macroporous materials exhibit outstanding properties in heat and mass transfer due to their high pore volume, high surface area, and high Young's modulus. Consequently, understanding their thermofluidic properties is crucial in the design, synthesis, and optimal application of these materials. Therefore, this study, premieres, the use of a machine learning (ML) backpropagation network to develop and
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Experimental investigation of nano-coating effects on extended surfaces for enhanced thermal management of heat sinks Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-29 N. Poyyamozhi, S. Senthil Kumar, P. Renugadevi, Prajith Prabhakar
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Cooling effectiveness enhancement of parallel air-cooled battery system through integration with multi-phase change materials Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-29 Abubakar Gambo Mohammed, Hasril Hasini, Karem Elsayed Elfeky, Qiuwang Wang, Mutari Ali Hajara, Nur Irmawati Om
This work presents a numerical investigation of the integration of conventional parallel air-cooling battery system with multi-phase change materials (PCMs) to improve the cooling effectiveness at low power consumption (P) rate. The study considers various cells partitioning of the PCMs on nine different parallel air-cooled battery packs. The impact of PCMs pattern schemes, inclination angle of the
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Experimental and numerical investigations on film cooling characteristics and hole shape improvement of turbine vane at one engine inoperative condition Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-28 Kun Du, Yuanyong Li, Qihao Chen, Xiaoming Shan, Cunliang Liu
This study investigates the film cooling characteristics of four cooling schemes of a gas turbine vane at various mass flux ratios (8.0%, 8.5% and 9.0%) using the Pressure Sensitive Paint (PSP) technology. The improved cooling scheme involves the alteration from cylindrical holes to laid-back fan-shaped holes and laid-back holes on the pressure surface and the leading edge. Considering the complex
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Numerical modeling and experimental validation of heat and mass transfer within decomposing carbon fibers/epoxy resin composite laminates Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-28 Nicolas Dellinger, Gillian Leplat, Cédric Huchette, Valentin Biasi, Frédéric Feyel
CFRP composite laminates decompose by pyrolysis/oxidation when exposed to high heat fluxes. While gaseous and solid residues created within the composite material are ignored in most models, a multi-species approach is proposed to describe transient decompositions from the virgin to the final charred state of the material. The model is based on a porous medium description that includes gas creation
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Thermal properties measurement of isotropic insulating materials with the transient hot plate method using a 3D semi-analytical model Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-28 Yves Jannot, Alain Degiovanni
Most of the thermal characterization methods using a uniform heating of a surface (Guarded Hot Plate, Transient Hot Plate, Fluxmeter Method) assume 1D transfer in the measurement area and neglect the in-plane heat transfer in the heating element. This results in limitations regarding the time interval for estimation, the thickness of samples or the possibility of simultaneously measuring thermal conductivity
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Thermohydraulic performance of the microchannel heat sinks with three types of double-layered staggered grooves Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-28 Lin Liu, Ling Zhang, Xinyu Zhang, Hui Xu, Herong Zhang, Siyue Zhou, Yang Cao
The thermohydraulic performance of the microchannel heat sinks with three types of double-layered staggered grooves are investigated by numerical simulation. The double-layered staggered grooves are staggered rectangular grooves (SRRG), staggered trapezoidal grooves (STLG) and staggered triangular grooves (STRG), respectively. The effect of the shape and geometrical parameters of the double-layer staggered
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Effects of hydrophilic surface on heat transfer performance of spray cooling Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-26 Juping Wang, Ni Liu, Yan Wang, Meiting Wang, Hua Zhang
The heat transfer characteristics of two hydrophilic surfaces, SM-QS3100 and ZCP-0010, were investigated in single-phase and two-phase zones in comparison to a smooth surface concerning spray cooling. The results showed that in the single-phase zone, the SM-QS3100 and ZCP-0010 hydrophilic surfaces could not enhance heat transfer, and the ZCP-0010 surface with better hydrophilicity had the worst heat
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Numerical study on transient coke deposition and heat transfer characteristics of hydrocarbon fuel in a mini-channel under varying wall heat flux Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-26 Guilin Wang, Luyang Han, Shuyuan Liu, Pengfei Wang, Weimeng Zhang
Dynamic coke deposition has significant influence on flow and heat transfer characteristics of regenerative cooling using hydrocarbon fuel. In the present work, the effect of coke deposition on flow and heat transfer performance of hydrocarbon fuel, n-Decane is numerically investigated under different heating modes including the constant heat flux (CHF), the periodic heat flux (PHF) and staged heat
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A comprehensive parametric study and multi-objective optimization of turbulent jet array impingement for uniform cooling of gas turbine blades with minimized compression power Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-25 Hooman Bahman Jahromi, Farshad Kowsary
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Application of the adaptive method to determine the process noise in the extended Kalman filter to estimate the parameters of the two dimensional inverse heat transfer problem Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-23 Ramin Sajedi, Farshad Kowsary, Ahmad Kahrbaeiyan, Javad Faraji
To deal with inverse nonlinear heat transfer problems in a two-dimensional heat conduction problem, this paper presents a hybrid approach combining fuzzy logic and the extended Kalman filter (EKF). The proposed algorithm has been applied to the real-time reconstruction of the temperature field, time-varying convective heat transfer coefficient, and time-varying boundary heat flux using temperature
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Computational characterisation of the heat flow meter method applied to moist bio-based insulating building materials Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-22 Daniela Florez, Partrick Perré, César Segovia, Romain Rémond
This paper investigates the role of moisture content on the measurement of the thermal conductivity of wood-based low-density fibreboards (LDFs) used for building insulation. To that purpose, a computational code of coupled transfers was used to simulate the widely used Heat Flow Meter (HFM) method. To widen the range of study, the thermal conductivity is obtained with a mixing law model to account
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Experimental and numerical study of the interaction between tempered glass fallout and enclosure fire dynamics Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-22 Xiaoqing Li, Yu Wang
Tempered glass, as an important type of safety glazing, is extensively used in high-rise buildings. However, little is known about the fallout behavior of tempered glass in the compartment with different fire locations. Therefore, in this work, the exposed framed glass panes with the dimension of 815 × 815 × 6 mm were heated by a pool fire in the compartment. The fuel pans were placed at six different
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Effects of the circumferential casing groove configuration on aerothermal performance of a transonic turbine stage Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-21 Weiqi Li, Zhi Tao, Liming Song, Jun Li, Zhenping Feng
In order to control tip leakage flow and improve the tip aerothermal performance, a circumferential casing groove (CG) configuration is proposed. Taking the typical transonic turbine stage TTM (Thermal Turbomachinery and Machine Dynamics) as the research object, the effects of CG with different heights (), initial locations () and widths () on the aerodynamic loss of the turbine stage and heat transfer
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Analysis of photothermal coupling of titanium nitride nanorods applied to near-infrared photothermal therapy Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-20 Qiuyu Luo, Yu Liu, Haotuo Liu, Xiaohu Wu
Titanium nitride (TiN) serves as an ideal reagent for photothermal therapy due to its cost-effectiveness, stability, and biocompatibility. This study investigates the optical and thermal properties of TiN nanoparticles in the near-infrared (NIR) region. Specifically, we employ the COMSOL Multiphysics software to solve Maxwell's equations using a finite element method, enabling us to investigate the
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Pore-scale investigation of transpiration cooling based on triply periodic minimal surface Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-20 Zhizhao Zhou, Yumei Lv, Fei He, Taolue Liu, Jianhua Wang
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Impact of variable properties in natural convection airflows within simple and adiabatically-extended vertical tubes Int. J. Therm. Sci. (IF 4.5) Pub Date : 2024-03-16 B. Zamora
Influence of variable thermophysical properties is investigated in airflows established by natural convection inside vertical tubes. Systematic numerical results are obtained for covering the entire range laminar to turbulent (modified Rayleigh number ranging –), for both isothermal and isoflux heating conditions. Particular attention is devoted to the effects of variable properties of air. Own functions