International Journal of Heat and Mass Transfer最新文献_第7页

A topology optimization method for managing transient thermal and vibration effects with eigenvalues and steady-state constraints 一种具有特征值和稳态约束的瞬态热和振动效应的拓扑优化方法

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-16 DOI: 10.1016/j.ijheatmasstransfer.2025.127083

Shuya Onodera , Takayuki Yamada

{"title":"A topology optimization method for managing transient thermal and vibration effects with eigenvalues and steady-state constraints","authors":"Shuya Onodera , Takayuki Yamada","doi":"10.1016/j.ijheatmasstransfer.2025.127083","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127083","url":null,"abstract":"<div><div>This paper presents a topology optimization method for the effective control of transient thermal conduction and vibration responses using eigenvalues and steady-state temperatures. Designing thermally efficient devices with transient responses, such as battery housings, is crucial for maximize operational efficiency. Eigenvalues were used to approximate the response, reducing the computational cost associated with the transient response in the optimization process. The objective functionals were evaluated using the weighted sum method. Maximum temperature constraints were incorporated into the eigenvalue problem by considering the steady-state temperature distribution. This study employed finite element analysis to solve the eigenvalue problems concerning vibration and heat transfer effects and to update the level-set functions. The effectiveness of this method was demonstrated by implementing two- and three-dimensional numerical examples, in which the thermal response was improved by maximizing the thermal eigenvalues, and the effects of thermoelasticity on the thermally efficient structures.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127083"},"PeriodicalIF":5.0,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial effects on thermal conductive properties in PEEK composites 界面效应对PEEK复合材料导热性能的影响

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-16 DOI: 10.1016/j.ijheatmasstransfer.2025.127037

Siqin Liu , Yanan Zhang , Xin Yan , Wuxiang Zhang , Xilun Ding

{"title":"Interfacial effects on thermal conductive properties in PEEK composites","authors":"Siqin Liu , Yanan Zhang , Xin Yan , Wuxiang Zhang , Xilun Ding","doi":"10.1016/j.ijheatmasstransfer.2025.127037","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127037","url":null,"abstract":"<div><div>Polyether ether ketone (PEEK) is a high-performance thermoplastic composite matrix material renowned for its exceptional mechanical properties and thermal stability, making it highly suitable for high-temperature applications. However, the interfacial thermal resistance (ITR) at the micro-scale interfaces between the polymer matrix and fillers in PEEK composites, which significantly impacts heat transfer, has not been extensively explored. In this study, we investigated the interfacial thermal properties of PEEK composites with various filler materials using molecular dynamics simulations and the theoretical model. Our results indicate that PEEK/SiO<sub>2</sub> composites exhibit superior interfacial thermal properties compared to other selected materials, while PEEK/SiC composites display the highest interfacial thermal resistance. Due to the effect of ITR, the introduction of fibers may not always improve the effective thermal conductivity of the composite. The effect of ITR is also related to the filler size and shape. Reducing the size of the filler magnifies the effect of ITR, and there is a critical filler length which could be used to distinguish between the positive and negative thermal effects of introducing fillers. Our research illustrates a multiscale modeling approach to evaluate the ITR effect on the thermal properties of PEEK composite, which could be extended to other composite systems. The findings could benefit the multiscale modeling of composite manufacturing and the micro-structure design of composites with consideration of thermal management.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127037"},"PeriodicalIF":5.0,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluid charging effects on thermal performance of sodium heat pipes and new approach for optimal filling 流体充注对钠热管热工性能的影响及优化充注的新方法

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-16 DOI: 10.1016/j.ijheatmasstransfer.2025.127099

Dong Hun Lee, In Cheol Bang

{"title":"Fluid charging effects on thermal performance of sodium heat pipes and new approach for optimal filling","authors":"Dong Hun Lee, In Cheol Bang","doi":"10.1016/j.ijheatmasstransfer.2025.127099","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127099","url":null,"abstract":"<div><div>This study investigates the influence of fluid charging on the thermal performance of sodium heat pipes and introduces a novel method for determining the optimal filling ratio. Sodium heat pipes are known as highly efficient heat transfer devices, utilizing phase change to maintain minimal temperature differences over long distances. However, their performance is highly dependent on the amount of working fluid charged. Underfilled heat pipes are susceptible to evaporator dry-out and temperature drops at the condenser caused by fluid depletion, resulting in significant temperature gradients. Conversely, overfilled heat pipes experience liquid pooling in the condenser due to excess liquid, which obstructs vapor flow and leads to temperature drops. These challenges are particularly evident in horizontal configurations and liquid metal heat pipes, where uncertainties in filling conditions persist due to the lack of effective methodologies. These temperature gradients substantially reduce the effective thermal conductivity of heat pipes. To address these issues, this study presents a series of experiments on sodium heat pipes under varying filling conditions. The findings offer practical methods for achieving optimal charging conditions and highlight the critical role of precise fluid charging in enhancing thermal performance and ensuring operational reliability.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127099"},"PeriodicalIF":5.0,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel banding method for efficient radiation transfer calculation in switching arcs 一种用于开关电弧有效辐射传递计算的带化方法

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-16 DOI: 10.1016/j.ijheatmasstransfer.2025.127058

S.V. Rohani , S. Esmaeili , J.D. Yan , J. Chou

引用次数: 0

Research on the coupled characteristics of multi-physics fields in direct energy deposition melt pool considering powder effect 考虑粉末效应的直接能量沉积熔池多物理场耦合特性研究

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.ijheatmasstransfer.2025.127074

Jianan Guo , Zhijie Wang , Zhenlin Wang , Zelin Xu , Shitong Peng , Fengtao Wang

{"title":"Research on the coupled characteristics of multi-physics fields in direct energy deposition melt pool considering powder effect","authors":"Jianan Guo , Zhijie Wang , Zhenlin Wang , Zelin Xu , Shitong Peng , Fengtao Wang","doi":"10.1016/j.ijheatmasstransfer.2025.127074","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127074","url":null,"abstract":"<div><div>Direct Energy Deposition (DED) is an additive manufacturing process that entails complex energy and material transformations. The rapid transport of heat and material within the melt pool plays a critical role in shaping the solidification morphology of the deposited layer. This paper develops a multi-physics numerical model for DED process, which integrates the Smoothed Particle Hydrodynamics (SPH) with the Discrete Element Method (DEM) and incorporates a powder-laser attenuation model. In the experiment, the residence time of the powder on the surface of the molten pool is influenced by temperature and the location of its entry, resulting in behaviors such as integration, floating, or adhesion. Moreover, the residence time increases with the distance from the laser zone. When powders in different states (single molten, agglomerated molten and unmolten) fall into the molten pool, the randomly added kinetic energy and heat disturb the existing Marangoni flow, triggering oscillations of varying intensities within the molten pool. Among these, fully molten powder exerts the least influence on the pool. Increasing the laser power or decreasing the powder velocity leads to higher powder deposition temperatures. The path of the powder from the laser center to the edge is particularly sensitive to variations in the parameters. This study provides a more comprehensive analysis of the interactions between the powder and the molten pool, thereby enhancing the accuracy of molten pool flow modeling.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127074"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of turbulence effects on sensitivity analysis and optimization performance in fluid-thermal coupled topology optimization 流-热耦合拓扑优化中湍流对灵敏度分析和优化性能的影响机理

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.ijheatmasstransfer.2025.127108

Yujie Guo, Xin Li, Silong Zhang, Jingying Zuo, Jianfei Wei, Wen Bao

{"title":"Mechanisms of turbulence effects on sensitivity analysis and optimization performance in fluid-thermal coupled topology optimization","authors":"Yujie Guo, Xin Li, Silong Zhang, Jingying Zuo, Jianfei Wei, Wen Bao","doi":"10.1016/j.ijheatmasstransfer.2025.127108","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127108","url":null,"abstract":"<div><div>Topology optimization has become a promising technique for the design of heat exchange devices. However, the application of topology optimization in turbulence flow coupled with the heat transfer process remains scarce mainly hindered by the critical step of sensitivity analysis. In this study, a continuous adjoint-based sensitivity analysis framework is developed for multi-objective topology optimization problems, and the information about turbulence effects on flow and heat transfer processes is incorporated into sensitivity analysis results by differentiating the turbulence viscosity within the diffusion terms. The developed framework is then applied to two topology optimization problems. The results reveal the mechanism of turbulence effects on sensitivity deviations, which are observed in both low and high Reynolds number flow regimes. Through the analysis of the backpropagation pathway of the thermal objective function gradient, it is revealed that the differentiation of the convective heat transfer term plays a dominant role in driving the formation of multi-branch cooling structures. Compared to the frozen turbulence assumption, the optimized heat sink structure considering turbulence effects demonstrates improved performance, with reductions of 3.84 % in flow losses, 2.61 % in mean temperature, and 3.34 % in maximum temperature rise.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127108"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on ammonia/water mixture desorption heat transfer for vapor absorption-compression heat pump 蒸汽吸收-压缩热泵氨/水混合解吸换热实验研究

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.ijheatmasstransfer.2025.127114

Khalid Hamid , Chi-Chuan Wang , Ignat Tolstorebrov , Armin Hafner , Trygve M. Eikevik

{"title":"Experimental study on ammonia/water mixture desorption heat transfer for vapor absorption-compression heat pump","authors":"Khalid Hamid , Chi-Chuan Wang , Ignat Tolstorebrov , Armin Hafner , Trygve M. Eikevik","doi":"10.1016/j.ijheatmasstransfer.2025.127114","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127114","url":null,"abstract":"<div><div>The aim of this study is to experimentally evaluate of brazed plate heat exchangers used as desorbers in absorption-compression heat pump systems, with a particular emphasis on recovering industrial waste heat applications. To reduce installation cost two vertical desorbers operating in different modes were experimentally investigated the overall heat transfer coefficient, using an ammonia-water mixture as the working fluid. To optimize the heat exchanger efficiency of plate type heat exchangers, an efficient design of desorber is an important factor in improving the performance of the system. The studied desorber system consists of two plate heat exchangers that are connected in series. The thermal performance of these units was analyzed under a constant heat source having an inlet temperature of 70 °C and a mass flux of 115 kg/m²⋅s. Experimental results revealed that, by varying the strong solution mass flux from 5 to 36 kg/m²⋅s, the following performance changes were observed in Desorber 1: heat load increased from 5 to 20 kW, the overall heat transfer coefficient improved from 1.1 to 1.7 kW/m²⋅K, and thermal efficiency increased from 66 % to 86 %. For Desorber 2, the heat load decreased from 17 kW to 14 kW, the heat transfer coefficient varied from 1.1 to 1.5 kW/m²⋅K, and thermal efficiency increased from 66 % to 80 %. Additionally, the vapor mass fraction at the outlet of Desorber 2 ranged from 0.1 to 0.6 kg/kg. The highest-pressure drop was recorded in Desorber 1. These results offer important insights for enhancing the design and functionality of desorber units in high-temperature heat pump systems, contributing to the development of more efficient and cost-effective solutions for industrial waste heat recovery.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127114"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication and performance evaluation of a polymer-based vapor chamber via 3D printing technology 聚合物基蒸汽室的3D打印制备及性能评价

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.ijheatmasstransfer.2025.127095

Chao Chang, Baocai Fu, Longda Liu, Qingao Jiang, Feng Guo, Fengmin Su, Yulong Ji

{"title":"Fabrication and performance evaluation of a polymer-based vapor chamber via 3D printing technology","authors":"Chao Chang, Baocai Fu, Longda Liu, Qingao Jiang, Feng Guo, Fengmin Su, Yulong Ji","doi":"10.1016/j.ijheatmasstransfer.2025.127095","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127095","url":null,"abstract":"<div><div>The advancement in flexible electronic devices has led to continuously increasing power density, which generates a large amount of heat during operation. Based on the advantages of excellent thermal conductivity and temperature uniformity, vapor chambers have been considered as an effective solution for solving the problem of high-performance electronics heat dissipation. In this work, we proposed a polymer-based vapor chamber with micro-grooves fabricated using 3D printing technology, which is a facile method for integrating and manufacturing the external shell structure and inner wick structure within the vapor chamber. Thermoplastic polyurethanes (TPU) are chosen as the 3D printed materials, allowing the fabricated vapor chamber a certain degree of flexibility. DI water as working fluid is injected into this fabricated polymer-based vapor chamber and various filling ratios are evaluated for its effect on the heat transfer capability. The experimental results show that 30 % is the optimal filling ratio, presenting the lowest thermal resistance of 2.11 K/W at a heating flux of 1.5 W/cm<sup>2</sup>, and the dry-out heat flux is 1.63 W/cm<sup>2</sup>. In addition, the polymer-based vapor chamber exhibits excellent temperature uniformity with a minimum surface temperature difference of 1.99 °C, which achieves the dispersion of local heat and the elimination of local hotspots. The fabricated polymer-based vapor chamber proposed in this work not only enables the effective thermal management of flexible electronic devices and wearable electronic products but also provides an alternative method for the design and manufacture of thermal management devices.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127095"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiphysics modeling of sorption compressors: A FEM-based thermo-adsorption framework 吸附压缩机的多物理场建模：基于fem的热吸附框架

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.ijheatmasstransfer.2025.127038

A. Xhahi , M.A.J. van Limbeek , C.H. Vermeer , H.J. Bulten , H.J.M. ter Brake

引用次数: 0

Large eddy simulation of film cooling mechanism in supersonic mainstream 超声速主流气膜冷却机理的大涡模拟

IF 5 2区工程技术

International Journal of Heat and Mass Transfer Pub Date : 2025-04-15 DOI: 10.1016/j.ijheatmasstransfer.2025.127071

Chuanqi Zhao , Xi Xi , Tiange Ma , Hong Liu , Liuzeng Ye

{"title":"Large eddy simulation of film cooling mechanism in supersonic mainstream","authors":"Chuanqi Zhao , Xi Xi , Tiange Ma , Hong Liu , Liuzeng Ye","doi":"10.1016/j.ijheatmasstransfer.2025.127071","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127071","url":null,"abstract":"<div><div>Large eddy simulation was employed to investigate the interaction between a sonic jet and a supersonic mainstream within the context of compressible film cooling. A computational framework in OpenFOAM has been developed to efficiently capture shock waves, vortex structures, and boundary layer interactions, incorporating adaptive mesh refinement and dynamic load balancing to reduce computational costs. The approach was validated qualitatively with shock waves and vortex structures and quantitatively with velocity distribution. The hydrodynamic effects of jet separation and reattachment in crossflow were investigated, including the impact of shock waves, boundary layers, and vortex structures on cooling efficiency. The results show that, the cooling region appears an arrow-like shape when a sonic separation and reattachment jet enters a supersonic crossflow. As the Mach number increases, the shock wave system becomes more pronounced, altering the cooling film's surface attachment capability and affecting overall cooling performance. In the downstream of the jet, the formation and development of the vortex system play a decisive role on the cooling efficiency. Additionally, the initial vortex system at the leading edge of the jet hole not only controls upstream cooling but also plays a crucial role in the formation of the overall cooling structure through its entrainment and mixing capabilities. As the Mach number of the mainstream increases, the initial vortex system carries more cooling energy, thereby improving overall cooling efficiency. Moreover, the interaction between shock waves and vortex structures influences the angle between turbulent heat flux and the temperature gradient, a more accurate model is needed to analyze the turbulent heat flux.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127071"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0