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Experimental investigation on the discharge and suction gas performance in the multilayer insulation microchannels Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-13 Yang Yu, Fushou Xie, Wan Guo, Di Yang, Yanzhong Li
The use of cryogenic propellants is prioritized for powering Mars lander propulsion systems. To provide thermal protection for these cryogenic propellants, a combination of multilayer insulation (MLI) and foam is commonly employed. However, during the Mars lander ascent, space travel, and reentry, unique phenomena such as transient venting and suction of gas occur within the MLI, significantly compromising
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Comparative analysis of condensation heat transfer and pressure drop of low GWP near-Azeotropic mixture and R-290 in a plate heat exchanger Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-12 Mohammad Salman, Palanisamy Dhamodharan, Rajendran Prabakaran, Sung Chul Kim
Downward condensation of a near-azeotropic low GWP refrigerant mixture of R290/R1270 (65%/35% wt.), named HC01, was investigated inside an offset strip-fin (OSF) flow-structured plate heat exchanger (PHE). This study tested the prototype heat exchanger with HC01 and compared the condensation heat transfer coefficient (CHTC) and pressure drop (CPD) with the pure R-290 for working conditions of refrigerant
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Thermo-hydraulic analysis in double-layered microchannels with porous rib and phase change microcapsules slurry as coolant Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-12 Chuntong Li, Wei Chen
The porous ribs and solid ribs paved with porous layer (combining ribs for short) on sidewalls are set respectively in upper and lower channels in double-layered microchannel heat sink (MCHS) with microencapsulated phase change material (MPCM) slurry as coolant to obtain better thermal performance. In the cases, more heat transfer occurs between coolant and solid ribs with MPCM slurry as coolant due
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Experimental study on flow boiling of two rectangular expanding microchannel heat sinks in series connection and flow patterns analysis Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-12 Jiang Zhengyong, Song Mengjie, Dang Chaobin, Xu Yingjie, Azizifar Shahram, Zheng Haikun
Addressing the cooling challenges posed by multi-heat sources with high heat flux in densely integrated electronic devices remains a pressing concern. A study was conducted to explore the performance of two distinct microchannel heat sinks, with featuring grooves or not, in a series connection. This investigative series connection mode exhibited notable enhancements in performance. Bubble behavior
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Visualization experiment and thermal-hydraulic behaviour of assembled self-rotating twisted tape in double-pipe heat exchangers Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-11 Juan Xiao, Song He, Guangshuo Xie, Simin Wang, Zaoxiao Zhang
To improve heat transfer and reduce higher flow resistance, we proposed an assembled self-rotating twisted tape inserted in the tube, which is characterized by automatic rotation when flowing through. The visualization experiment performed hydraulic performance under different flow rates, and passive motion was solved by combining dynamic mesh and Six Degrees of Freedom method to obtain the force distribution
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An experimental study on the spreading characteristics and burning behaviors of continuous spill fires under cross flow Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-10 Hanchao Ma, Jinlong Zhao, Hong Huang, Jianping Zhang, Zhenhua Wang
Fuel leakage and spill fires often occur during storage and transportation of liquid fuels. And the spread and burning processes of spill fires are susceptible to cross-air flows. In this paper, spill fire experiments were conducted on a fireproof glass (with or without ignition) under different wind speeds (0–2 m/s). The effects of wind on the spread process and burning behaviors were analyzed. Results
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Influence of incidence angle and squealer tip cutback on the aerothermal performance of a transonic turbine blade Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-10 Jiang Shoumin, Jiang Hongmei, Tao Zhi, Lu Shaopeng, Yan Yifei, Song Liming
Experimental and numerical investigations were conducted to examine the influence of inlet incidence angle and squealer tip cutback on a turbine blade. The measurements of aerodynamic loss and tip heat transfer were performed under transonic conditions. Numerical models were established and validated using experimental data to gain insight into the underlying flow and thermal physics. The results demonstrate
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Optimizing diverse triplex-tube heat storage systems with composite phase change materials in simultaneous charging and discharging environment Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-09 Md Tabrez Alam, Rajesh Kumar, Anoop K. Gupta
In this study, the thermal performance of triplex-tube heat storage system consisting of RT55 phase change material and Cu metal foam composite was investigated to find out the most efficient configuration among 17 distinct models (M1-M17) categorized into 4 distinct classes. Under simultaneous charging and discharging conditions, the melt fraction and latent heat storage capacity were calculated and
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Analysis of a chaotic system of equations for ethanol-based graphene pulsating heat pipe Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-09 Yuchen Fan, Zhiguo Wang, Changyu Liu, Zhonghua Wang, Yushuang Dong
When cooling electronic components, pulsating heat pipes, an effective heat exchanger, are frequently paired with fins. Common fluid-solid coupling approaches, however, are unable to completely characterize its internal features due to the complexity and variety of its internal forces, which are often chaotic systems heavily influenced by the initial value. In this study, we build a three-dimensional
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Experimental characterization and geometrical optimization of a commercial two-phase designed cold plate Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-09 Najmeh Fallahtafti, Farzaneh Hosseini, Yaser Hadad, Srikanth Rangarajan, Cong Hiep Hoang, Bahgat Sammakia
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Metallic PCM-based battery thermal management system for fast charging/discharging applications Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-08 Shahid Ali Khan, L.I. Xiangrong, Kwun Ting Lau, Kejian Dong, Sihong He, Saikh Mohammad Wabaidur, Amrit Kumar Thakur, Jiyun Zhao
Fast charging technology is critical for increasing user convenience and promoting the wider adoption of electric vehicles (EVs), but it also poses significant thermal issues that require effective temperature management systems. This article proposes a new battery thermal management system (BTMS) based on metallic phase-change materials (MPCMs) and liquid mini-channels. The BTMS aims to address the
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Investigation of heat transfer and electrokinetic energy conversion efficiency on electromagnetohydrodynamic flow of couple stress fluid through a circular microchannel Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-08 Brijesh Kumar, Srinivas Jangili
The present study delves into the flow characteristics of a couple stress fluid under the influence of electromagnetic fields in a micro-circular-tube with a slippery inner surface. This investigation considers the flow to be actuated by pressure gradient, electromagnetic force, and induced streaming potential field with slip boundary condition. Mathematical model is developed to determine the solution
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Identification of the surface heat flux of charring ablative materials using dynamic Bayesian network based on multisource information fusion Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-06 Hao Shu, Songhe Meng, Bo Gao, Guokai Han, Qiang Yang, Fajun Yi, Lijun Zhuo
In order to solve the dual uncertainty problem between heat flux and thermophysical properties in the identification of the heat flux of charring ablative materials, a dynamic Bayesian network (DBN) based on multisource information fusion is proposed. The method is divided into two stages, with thermophysical properties identified in the former stage and the heat flux identified in the latter stage
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Numerical simulation of heat pipe solar system combined with finned thermal storage unit incorporating mixture of nanoparticles and paraffin Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-06 M. Sheikholeslami, S.M. Mousavi
The core aim of this investigation is to simulate the melting of paraffin within a solar heat pipe unit combined with thermal storage unit, while taking into account the presence of metallic fins. To enhance system performance, Multi-Walled Carbon Nanotube (MWCNT) nanoparticles were blended into the paraffin material (RT82) using a homogeneous mixture approximation. The temperatures of the heat pipe
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A new analytical method for transient heat conduction in composite disks applied to thermal plug and abandonment of oil wells Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-06 Gabriel S. De Andrade, Fabrício J.C. Pena, Marcelo J.S. de Lemos
A new hybrid method for transient heat conduction problems is developed and applied to simulate a Plug and Abandonment (P&A) operation of oil wells. An oil well is approximated by concentric disks in a one-dimensional configuration, which allows for use of polar coordinates. The application of the Separation of Variables Method (SVM) is used as the analytical framework for the solution of the conductive
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A fast Bayesian parallel solution framework for large-scale parameter estimation of 3D inverse heat transfer problems Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-06 Chen Wang, Yi Heng, Jiu Luo, Xiaoqiang Wang
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Experimental investigation of the small-scale prototype of the dew point water recovery system Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-05 Aleksandra Cichoń, Mikołaj Matuszczak, Anna Jurga, Paweł Krowicki, Grzegorz Iskierka, Bartosz Poskart, William Worek, Sabri Cetin, Demis Pandelidis
The article presents experimental investigation of the Dew Point Water Recovery (DPWR) system designed for clean water recovery using the dew point cooling phenomenon. The technology is a novel distillation process which allows for highly efficient water recovery. It is a first distillation technology which allows for water distillation through direct contact with atmospheric air. The authors designed
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Effect of structure parameters on thermal performance of novel punched V-shape VGs for hear exchangers: An experimental approach Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-05 Jiangbo Wang, Liangcai Zeng, Yuting He, Bing Zhao, Peng Chu
The use of perforated technology on the surface of the vortex generator (VG) has been proven to further enhance heat transfer performance by reducing its pressure loss. Based on this technology, a new type of turbulence insert is proposed in this work, which is composed of a V-shaped fixed ring with perforated rectangular VGs. The influence of its number ( = 2, 4, 6), VG area (S = 10, 20, 30 ), and
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Experimental study on heat transfer behavior and prediction of heat transfer deterioration of supercritical nitrogen in vertical tubes Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-05 Runfeng Xiao, Liang Chen, Yu Hou, Chang Du, Yuqing Cai
Heat transfer characteristics of supercritical cryogenic fluids play important role in thermal equipment for liquid air energy storage, liquid hydrogen, etc. In this study, a low-temperature and high-pressure experimental device was established to investigate the heat transfer behavior of supercritical nitrogen. The combined effects of forced convection and drastic changes in physical properties should
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Thermal analysis for SWCNTs and MWCTs due to coaxially stretchable disks with applications of viscous dissipation and thermal radiation: Artificial neural network analysis Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-05 Faqir Shah, Asadullah, Shahid Ali, Sami Ullah Khan, Mehdi Akermi, Samia Nasr, Rym Hassani, Nejmeddine Smida Jaballah
Owing to exclusive thermal prospective of nanoparticles, diverse applications of such materials have been reported in heat transfer systems. The carbon nanotube (CNTs) is the modified class of nanoparticles which is preserve more stable thermal properties. The decomposition of CNTs with base materials offer special applications in enhancing thermal efficiency of energy systems, nuclear processes, sensors
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Numerical optimum investigation of hydrothermal characteristics over a porous bank of flat tubes heat exchanger Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-05 Amer Al-damook, Waleed M. Abed
Tube-bank heat exchangers with porous media are highly beneficial for many industrial and thermal engineering applications as they enhance heat transfer efficiency. The purpose and innovation of the current numerical investigation are to study the impact of the porous medium (aluminium foam) on the optimal thermo-hydraulic performance of a staggered flat-tube bank by adopting ANSYS FLUENT-CFD software
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Influence of inner tube shapes on the charging and discharging performance for the latent heat thermal storage exchangers Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-04 Shaobin Zhou, Hui Dai, Ming Gao, Suoying He, Pingping Niu, Yuetao Shi, Jianhui Qi, Fengzhong Sun
Changing the inner tube shape proves to be an effective method to enhance the efficiency of horizontal latent heat thermal energy storage exchangers (H-LHTES), which can improve the heat transfer efficiency of exchangers. This paper proposed an I-beam inner tube exchanger, which contained I-1 and I-2 types, then under the constant mass of phase change material, the charging and discharging performance
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Effects of the plate in-flow barriers on the thermal performance of an asymmetric Wavy channel Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-04 Fatemeh Azargar, Javad Rostami
Wavy channels are being used in compact heat exchangers. Adding in-Flow barrier with low increase in pressure drop can increase the Nusselt number in these channels. In some barrier location for low Reynolds number with no vortex, barrier will create vortex and for higher Reynolds number with vortices, a barrier in some positions can change the vortex size or even eliminate the vortices. Then barrier
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Experimental comparison of finned tube heat exchangers for heat rejection under natural convection conditions Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-04 Mikołaj Matuszczak, Karol Nycz, Wojciech Mazurek, Paweł Krowicki, Sławomir Pietrowicz, Demis Pandelidis
This article presents experimental analysis of heat removal capabilities of a wavy finned tube heat exchanger operating under natural convection conditions Two types of heat exchangers are considered in this work: standard construction exchangers, most often found in waste heat rejection devices and exchangers based on a novel geometry, which supports intensification of heat transfer processes under
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Analytical and numerical modeling of phase change material and hybrid PCM-heat sinks for high-power wireless EV charging Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-04 Mahdi Ghorbani, Hailei Wang, Nicholas Roberts
With the growing need of electrifying the transportation industry, high-power electric vehicle (EV) charging stations will play an instrumental role. This study focuses on passive thermal management designs using phase change materials (PCM) to transfer 1 MW of electrical power to heavy-duty vehicles within a 35-min timeframe. Various heat sink configurations and hybrid PCM are numerically investigated
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Estimation of heat flux entering the bone during the drilling process using the inverse heat transfer method Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-04 Somayeh Davoodabadi Farahani, Vahid Tahmasebi, Davood Toghraie
Drilling is one of the most important surgical steps and bone fracture repair. In this step, the temperature may exceed 47 °C and thermal necrosis may occur, which has irreversible consequences. Knowing the amount of heat transferred to the bone and its changes can be effective in recognizing this heat damage and minimizing it. In this research, it was tried to estimate the amount of heat flux entering
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Effect of vertical vibration on transient heat transfer characteristics of flow boiling in small rectangular channels Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-03 Wen-Bin Shao, Yun-Long Zhou, Zhong-Yuan Hu
In the thermal management of fuel cell vehicles, radiators are subjected to vibrations due to vehicle speed and road surface irregularities. However, there has been no comprehensive study of the impact of these vibrations on the heat transfer performance of radiators. Therefore, this paper employs R141b to conduct three-dimensional transient numerical simulations of flow boiling in small channels under
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A strategy of mixed tube bundle to improve anti-deposition performance and heat transfer Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-03 Ran An, Xiaobing Zhang
Ash deposition is a key issue that limits the energy utilization and safety operation of high-energy-consuming equipment in industrial applications, and the clarification of the heat and mass transfer process under ash deposition is vital. To improve the anti-deposition performance of tube bundles and mitigate heat transfer deterioration, a mixed strategy with attached small cylinders arranged behind
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Research on the R513A condensation heat transfer characteristics in horizontal microfin tubes Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-02 Zhenyang Lu, Jingde Jiang, Cheng Tang, Leren Tao, Jianhong Chen, Zhigao Zheng, Hong Tao, Lihao Huang
R513A has been proposed as alternative to R134a due to its lower GWP. So, it is necessary to investigate the condensation heat transfer characteristics and pressure drop of R513A in the horizontal tubes. The 12.70-mm-OD and 9.52-mm-OD tubes were selected for condensation tests. It was found that the R134a condensation heat transfer coefficient in the 12.70-mm-OD microfin tube was similar to the R513A
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Evaluating chemical reactions in fluid convection with rigid salt finger boundaries Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-02 Y.M. Gifteena Hingis, M. Muthtamilselvan, Ziyad A. Alhussain
Numerous disciplines, including fluid dynamics, heat transfer, geophysics, materials science, and environmental engineering, use Rayleigh numbers, both thermal and solute, extensively. They are crucial resources for foreseeing and comprehending fluid convective processes and their effects on many physical systems. In this analysis, we first derive the governing equations that describe the evolution
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Conjugate heat transfer in spatial laminar-turbulent transitional channel flow Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-02 William I. Machaca Abregu, Enzo A. Dari, Federico E. Teruel
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The effect of solid nitrogen on nucleate boiling heat transfer in a slush nitrogen pool Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-01 Qidong Wang, Tao Jin
The nucleate boiling heat transfer in a slush nitrogen pool has been studied across a heat-flux range from 5 to 400 kW/m and a system pressure range from 12.5 kPa (triple point pressure) to 101 kPa (atmospheric pressure). The effect of solid nitrogen on the heat transfer process was found to vary with the heat flux and the pressure. Experimental results reveal that the nucleate boiling heat transfer
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Experimental and meta-heuristic optimization for the highest thermo-hydraulic performance of a solar air heater with a V-notch pattern of hemispherical protrusions on absorber surfaces Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-01 Premchand Kumar Mahto, Balaram Kundu
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The impact of random 3D roughness on natural convection along a vertical plate Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-01 Tse-Yu Chen, Chung-Gung Li
This study simulates natural convection on vertical surfaces with random roughness under Reynolds number conditions of . The roughness of these surfaces is arranged randomly, making the simulation closer to real-world conditions. To handle natural convection in low-speed compressible flows, our solver treats the fluid as compressible to solve the complete Navier-Stokes equations. Observations show
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Mitigating Joule heating in smart nanochannels: Evaluating the efficacy of AC vs. DC fields Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-04-01 Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
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Analysis of frost layer growth behavior on cryogenic surfaces in ultralow dew point environments by experimental tests and numerical simulations Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-30 Jie Wang, Jing Wang, Linzhe Xie, Fusheng Peng, Luyang Shi
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Adopting a hot film to measure thickness of an ice layer under sweeping wind Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-30 Tengfei (Tim) Zhang, Shanran Wang, Feng Wang
Ice can easily form on low-temperature surfaces. To prevent damage caused by undesirable ice, the presence of ice on a surface together with the ice thickness must be determined. This investigation proposed to measure the thickness of an ice layer under sweeping wind using a hot film and two thermocouples. On the basis of the steady temperature gradient in the ice layer and the solved ice-layer surface
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Performance evaluation criteria based on the first and second laws of thermodynamics Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-30 Yutaka Asako, Chungpyo Hong, Lit Ken Tan, Mohammad Faghri
Numerical simulations were conducted to investigate the correlation between assessments based on the total entropy generation rate criterion and the thermal resistance criterion in the context of evaluating heat transfer performance. This study focused on a parallel plate channel heat sink with the lower wall subjected to a constant heat flux, under various flow constraints. The flow was assumed to
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Controlling TPMS lattice deformation for enhanced convective heat transfer: A comparative study of Diamond and Gyroid structures Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-29 Abdallah Barakat, BeiBei Sun
This study investigates the enhancement of convective heat transfer in Triply Periodic Minimal Surfaces (TPMS), focusing on Gyroid and Diamond lattice structures. An innovative lattice structure control method, employing a Deform-Control parameter (), is proposed to modulate lattice deformation within their mathematical frameworks. Numerical simulations validated by experimental measurements were conducted
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Synergistic impact of horizontal fin installation height and nanoparticle volume fraction to enhance charging performance of phase change materials (PCMs) Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-29 Meizhuting Qiu, Benli Peng, Xinyu Xu, Yong Zhou, Rong Zhang, Fengmin Su, Jianchi Xin
This study numerically analyses the synergistic influence of nanoparticle and orthogonal fin on heat transfer performance of phase change materials using enthalpy-porosity method. The natural convection heat transfer and heat conduction during the melting process are coordinated by varying nanoparticle volume fraction and installation height of fin. Results illustrate that the optimal installation
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Computational study of thermal and fluid mixing behaviour of a dual jet flow using LES approach Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-29 Tej Pratap Singh, Anupam Dewan
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A machine learning based approach for predicting Pool boiling heat transfer coefficient of CNT + GO nanoparticle coated surfaces Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-28 Ranjan Kumar, Saurabh Dubey, Dipak Sen, S.K. Mandal
The use of machine learning in the field of thermal engineering not only enhance the accuracy of predictions but also allows the investigation of parametric effects and the understanding of intricate mechanisms in boiling heat transfer. In this investigation, pool boiling experiment is performed on CNT + GO coated copper surface to generate the dataset. Twelve number of coated samples are prepared
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Multi-field coupling lubrication interface heat transfer model for hypoid gear transmission Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-28 Han Ding, Wenzhe Zhang, Haohua Wu, Tangwei Chen, Songshi Li, Hongping Li, Zhenyu Zhou, Xiaozhou Hu
For hypoid gear transmission showing time-varying meshing characteristics, three always is a very complicated solid-liquid-thermo-mechanical coupling lubrication interface behavior. In full consideration of tooth flank roughness and non-Newton fluid effect for this thermal elastohydrodynamic lubrication (TEHL) interface, an innovative multi-field coupling lubrication interface heat transfer model is
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Optimization of mass and heat flux of MHD viscous fluid flow with constant proportional Caputo derivative by using response surface methodology: Sensitivity analysis Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-28 Li Chen, Dilawar Hussain, Bo Sun, Muhammad Kazim, Munawwar Ali Abbas
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An improved CFD particulate fouling simulation method: The local fouling method Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-28 Zhimin Han, Jiang Li, Zeqi Chen, Wei Liu
In most of the modern and developed industries, water is used as heat transfer fluid. However, the accumulation of many precipitates and suspended solids in some locations results in particulate fouling on the surface of heat exchangers. To anticipate the particulate fouling deposition at the specific location of the heat exchanger channel, an improved CFD particulate fouling model is proposed in this
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Thermo-hydraulic characteristics and structural optimization of supercritical CO2-cooled microchannel heat sink Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-28 Hao Huang, Yuling Zhai, Zhouhang Li, Hua Wang
Supercritical carbon dioxide (sCO) serves as an efficient working fluid in microchannel heat sinks (MCHS), effectively mitigating heat dissipation challenges in high heat flux microelectronic devices. Nonetheless, the issue of flow acceleration affecting micro-scale heat transfer, especially in channels with diameters <0.2 mm, warrants additional investigation. Flow acceleration exacerbates temperature
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Analysis of vortex mixing in passive micromixers with misaligned inlet and rectangular winglets Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-28 Tarang Agarwal, Liqiu Wang
In the present study, a three-dimensional design of a passive micromixer is proposed which induces the swirling flow pattern by employing the misaligned inlets and winglets. The concepts of fluid stretching and twisting are utilized to improve the mixing efficiency. Stretching is quantified in terms of the modified flow tortuosity parameter. The dependence of various geometrical parameters on flow
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Numerical study of heat transfer and fluid flow in the offset strip-fin heat exchanger: A fin-by-fin analysis Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-28 Paolo Blecich, Josip Batista, Mateo Kirinčić, Anica Trp, Kristian Lenić
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Transient behavior of flow boiling in structured microchannels under sudden and highly variable heat loads Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-28 Burak Markal, Alperen Evcimen
In practice, heat sinks are sometimes exposed to sudden and irregular or highly variable heat loads. Therefore, here, for expanding micro-pin-fin heat sinks having micro cavities (heat sink code: MD) transient flow boiling characteristics are investigated under sudden and highly variable heat loads. Results are compared with those of conventional parallel channel heat sink (SD). Experiments can be
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Crystallization dynamics of the post-cooling molten slag against temperature rise Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-27 Bing Ding, Yongjun Qiu, Deshan Sun, Yu Tan, Junjun Wu
Turning molten slag into a solid state involves a complex cooling history that significantly influences the quality of the final product. It is crucial to unveil the crystallization dynamics of molten slag during practical cooling, particularly in the post-cooling course with temperature rise. In this work, we employed the single hot thermocouple technique to visually investigate the crystallization
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Numerical simulation of fluid-particle flow of jet in supercritical water environment Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-27 Chuan Zhang, Yuqi Shang, Haozhe Su, Zhiwei Ge, Liejin Guo
Supercritical water gasification provides a new approach to the green transformation of coal. Nevertheless, the flow characteristics of fluids and particles injected into the reactor through the nozzle still need to be further investigated. In this paper, a three-dimensional numerical simulation of the particle jet in supercritical water environment is carried out coupling Large Eddy Simulation (LES)
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CFD simulation of the inundation effect for saturated propane vapor condensation on the surface of a horizontal tube using the volume of fluid method Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-27 K.B. Minko, V.I. Artemov, A.A. Klementiev
The inundation of the lower tubes in a tube bundle with condensate formed on the upper tubes is among the major causes of reduced condensation rate. Experimental methods can hardly be used to get detailed information on the inundation effect, since each factor that controls the condensation process should be considered individually. However, CFD modelling using direct interface-tracking methods is
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Experimental study of relative humidity absorbed through capillarity of building material under isothermal conditions: Clay-Kaolin reinforced with Alfa fibers Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-25 Rachid Bouferra, Abdeltif Bouchehma, Younes Bahammou, Mohamed Essaleh, Soufiane Belhouideg, Abdelkader Lamharrar, Ali Idlimam
The research article aims to investigate the hygroscopic behavior of water absorbed by capillarity in clay supplemented with Alfa fibers. This specific clay-fiber composite holds significant importance in Moroccan construction practices. The primary aim is to enhance comprehension and control over the material's hydrothermal behavior by investigating moisture absorption traits, responses to varying
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Revisiting the scattering regime map based on transport scattering coefficient for dielectric particulate medium Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-25 Aristo Taufiq, Hakan Ertürk, Refet A. Yalçın
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Pulsating non-Newtonian heat and fluid flow in a concentric annular duct: An analysis using perturbation series method Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-23 Ayse Nur Altunkaya, Orhan Aydin, Mete Avci
In the current study, an analytical analysis is conducted to examine laminar pulsating flow and heat transfer of power-law fluid in a concentric annular channel that is uniformly heated. The momentum and energy balance equations are solved analytically using the perturbation series method under the assumption that fully developed hydrodynamic and thermal conditions exist. Nondimensional frequency and
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Numerical analysis study on determination of unfrozen water saturation curve for sandy soil Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-22 Seok Yoon, Gyu-Hyun Go
The presence of unfrozen water in frozen soils considerably affects the thermal, hydraulic, and mechanical behaviors of the ground. A thorough examination and accurate estimation of the unfrozen-water saturation curve of target soil materials are required to reliably predict the behavior of frozen soils. This study presents a methodology for accurately determining the curve-fitting coefficients included
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Numerical investigation on heat transfer characteristics in battery thermal management with phase change material composited by toroidal porous medium Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-22 Bingbing Li, Liwei Zhang, Bichen Shang, Yutao Huo
The introduction of a high-thermal-conductivity porous medium stands as an effective strategy for enhancing the heat transfer rate within battery thermal management using phase change material (PCM). In this study, we have delved into the investigation of heat transfer augmentation in battery thermal management through the implementation of toroidal porous medium. The exploration encompasses the effects
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Numerical study on generalized heat and mass transfer in cross-rheological fluid in the presence of multi-nanoscale particles: A Galerkin finite element approach Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-22 M. Nawaz, Rasib Gulzar, Sayer Obaid Alharbi, A.S. Alqahtani, M.Y. Malik, A.S. El-Shafay
Thermal and concentration memory effects on the transport of heat and mass subjected to magnetic field and non-uniform free stream velocity are studied in this article. A cross-rheological model is used with governing laws that are solved numerically using the finite element method (FEM). A computer program is developed. The convergent and grid-independent solutions are computed, which are further
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Pore structure characterization and effective thermal conductivity modeling of fibrous building thermal insulation materials based on X-ray tomography Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-22 Kang Liu, Yingying Wang
The existing structural characterization methods of building materials as well as thermal conductivity calculation models can not be directly applied when considering fibrous building thermal insulation materials with intricate skeletons. In this study, rock wool is considered the research object, and the X-ray tomography method is used to characterize the pore structure and extract structural parameters
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Enhancing boiling heat transfer by high-frequency pulsating jet with piezoelectric micropump Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-22 Yiwen Fan, Linyi Xiang, Xinfeng Zhang, Guanying Xing, Yanhua Cheng, Run Hu, Xiaobing Luo
Two-phase jet impingement provides a compact cooling solution capable of dissipating high heat flux at a low pressure drop, making it favorable for electronic cooling. However, there is still a limited understanding of the boiling characteristics of high-frequency pulsating jets. To address this knowledge gap, experiments are conducted using a piezoelectric micropump to study the boiling heat transfer