International Communications in Heat and Mass Transfer最新文献_第6页

The dynamic characteristics of hollow droplet impacting spherical surfaces with different wettabilities 空心液滴冲击不同润湿性球面的动力学特性

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI: 10.1016/j.icheatmasstransfer.2025.109735

Bingbing Yan, Chengbin Sun, Lijuan Qian, Li Lv

{"title":"The dynamic characteristics of hollow droplet impacting spherical surfaces with different wettabilities","authors":"Bingbing Yan, Chengbin Sun, Lijuan Qian, Li Lv","doi":"10.1016/j.icheatmasstransfer.2025.109735","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109735","url":null,"abstract":"<div><div>To investigate the influence of surface wettability on impact dynamics, this study combines experimental and theoretical approaches to elucidate the complex behavior of hollow glycerol droplets impacting spherical surfaces with varying wettabilities and size ratios. Experimental observations reveal that collisions with spheres of different curvatures induce phenomena such as reflection flows, encapsulation, and bubble detachment. Unlike solid droplets, which rebound and form dome-shaped structures upon impact, hollow droplets exhibit fluid instability during spreading due to internal bubble collapse, leading to film rupture and suppression of rebound, ultimately forming “doughnut-shaped” structures. For hollow droplets composed of 25 % glycerol–water mixture, the critical Weber numbers for reflection flows traversing the internal bubble are 140 and 175 on hydrophilic and hydrophobic surfaces, respectively, increasing to 217 for 50 % glycerol solutions. The maximum reflection flow length reaches 7.11 mm in deionized water and decreases with increasing viscosity. The deviation between bubble rupture time and the time to maximum spreading is approximately 3 %, with central jet detachment occurring at t<sub>c</sub>/ <span><math><mi>τ</mi></math></span>=22.08We<sup>-0.76</sup>. Based on volume and mass conservation principles, the residual film thickness h on the spherical surface and the spreading velocity U<sub>0</sub> of the hollow droplet were predicted. Furthermore, a theoretical model incorporating gravitational effects was developed to describe the maximum spreading factor <span><math><msub><mi>β</mi><mi>m</mi></msub></math></span> on spherical surfaces, with a 7 % deviation from experimental measurements.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109735"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262257","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

Study on temperature-controlled by phase change materials and energy analysis in a refrigerated vehicle during the door opening 冷藏车车门开启过程相变材料控温及能量分析研究

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI: 10.1016/j.icheatmasstransfer.2025.109824

Puxian Ding , Yingsun Sun , Shiming Liu , Di Fan , Ye Feng , Xinqiang Liao

{"title":"Study on temperature-controlled by phase change materials and energy analysis in a refrigerated vehicle during the door opening","authors":"Puxian Ding , Yingsun Sun , Shiming Liu , Di Fan , Ye Feng , Xinqiang Liao","doi":"10.1016/j.icheatmasstransfer.2025.109824","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109824","url":null,"abstract":"<div><div>This study investigates how phase change materials (PCMs) mitigate temperature rise and energy consumption during door openings in refrigerated vehicles at 66 % loading capacity. Numerical simulations are employed to analyze airflow patterns, thermal dynamics, and energy consumption. Key findings include: When the fan is off, external hot air enters the compartment, raising internal temperatures and impacting both the food and the PCM. With the fan on, airflow reduces direct contact between the hot air and the food, and increasing inlet velocity helps prevent excessive temperature rise. However, an inlet velocity of 3 m/s causes the air to escape the compartment, diminishing the cooling capacity of the PCM and raising the internal temperature. Baffle designs effectively block hot air, particularly in areas near the door, mitigating temperature rise and slowing food warming, thus reducing recovery energy. Higher inlet velocities increase cold energy consumption, with an inlet velocity of 3 m/s showing the highest consumption due to direct airflow from the fan. However, baffles reduce cold energy usage. The inlet velocity with 2 m/s in the baffle case is identified as optimal, balancing temperature control, food quality preservation, and lower recovery energy consumption. It also improves cold energy efficiency and reduces hot air intrusion.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109824"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262862","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

Nanoscale insights into bi-conductive surfaces: An analytical study of enhanced pool boiling performance through wettability and thermal conductivity 纳米级双导电表面的洞察：通过润湿性和导热性增强池沸腾性能的分析研究

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI: 10.1016/j.icheatmasstransfer.2025.109746

Sina Li, Sihong He, Kejian Dong, Yuzhe Li, Song Ni, Jiyun Zhao

{"title":"Nanoscale insights into bi-conductive surfaces: An analytical study of enhanced pool boiling performance through wettability and thermal conductivity","authors":"Sina Li, Sihong He, Kejian Dong, Yuzhe Li, Song Ni, Jiyun Zhao","doi":"10.1016/j.icheatmasstransfer.2025.109746","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109746","url":null,"abstract":"<div><div>Recent advancements in surface modification technologies have led to significant enhancements in heat transfer techniques for pool boiling, particularly through the use of bi-conductive surfaces. While many experimental studies have examined heat transfer on these surfaces, research at the nanoscale remains limited. This study employs molecular dynamics methods to investigate the boiling performance of bi-conductive surfaces and the combined effects of mixed wettability and conductivity on heat transfer mechanisms at the nanoscale. Our findings reveal enhanced heat transfer performance on bi-conductive surfaces, consistent with experimental observations. This enhancement is attributed to convective effects arising from uneven pressure distribution at the solid-liquid interface, as analyzed through the temperature profiles and velocity profiles of liquid atoms, heat transfer coefficient, and bubble volume. We also examine preferential bubble nucleation regions and thermal resistance on bi-conductive surfaces. Additionally, the boiling performance of surfaces with patterned structures is explored, including both biphilic and bi-conductive patterns. The combined effects of these patterns are analyzed, as modifications in surface wettability often accompany the introduction of materials with varying conductivities. The results indicate that surfaces exhibiting both biphilic and bi-conductive characteristics achieve earlier evaporation—an advantage of biphilic surfaces—during the initial boiling stage, while also demonstrating superior boiling performance—an advantage of bi-conductive surfaces—during later stages.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109746"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262255","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

An experimental study on condensation frosting characteristics on vibrating cold surfaces 振动冷表面结霜特性的实验研究

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI: 10.1016/j.icheatmasstransfer.2025.109803

Xuan Zhang , Kailiang Li , Binfei Zhan , Qiang Yang , Zhichao Wang , Long Zhang , Mengjie Song

{"title":"An experimental study on condensation frosting characteristics on vibrating cold surfaces","authors":"Xuan Zhang , Kailiang Li , Binfei Zhan , Qiang Yang , Zhichao Wang , Long Zhang , Mengjie Song","doi":"10.1016/j.icheatmasstransfer.2025.109803","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109803","url":null,"abstract":"<div><div>Frosting on cold surfaces influences the system efficiency and the role of surface vibration in frosting is not clear. This study experimentally investigates the effect of vertical vibration on the condensation frosting process on horizontal cold surfaces, especially the edge region, condensation droplet, and frost layer characteristics. An edge region with significantly larger condensation droplets is observed during the frosting process and its boundary can be quantitatively identified by analyzing the droplet distribution features. The surface vibration weakens the effect of the edge region and significantly shortens the period of droplet condensation stage. The period under a 1000 μm vibration amplitude is approximately reduced to a half of that on a stationary surface. The vibrating surfaces generally yield a larger frost layer height and growth rate. The frost layer height under a 250 μm vibration amplitude reaches 150.13 % of that on a stationary surface. As the vibration amplitude increases, the frost layer growth rate and roughness first go up and then decrease owing to the competition between the enhanced heat and mass transfer and the inertia force caused by the surface vibration. The findings provide reference for optimizing frosting control strategies.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109803"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262258","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

Optimization of piston trajectory in micro free-piston generators 微型自由活塞发电机活塞轨迹优化

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI: 10.1016/j.icheatmasstransfer.2025.109785

Yong Liu , Xiaofeng Zhang , Fukang Ma , Zhiqiang Liu

{"title":"Optimization of piston trajectory in micro free-piston generators","authors":"Yong Liu , Xiaofeng Zhang , Fukang Ma , Zhiqiang Liu","doi":"10.1016/j.icheatmasstransfer.2025.109785","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109785","url":null,"abstract":"<div><div>The miniaturization of electrical equipment and the popularity of portable devices are attractive drivers for the development of small thermal engines. However, as the size of engines shrinks, problems that can be neglected at conventional scales become prominent in micro-compact heat engines. For micro free-piston generators (MFPG), their unique flexible piston trajectories offer new ways to improve common problems of micro-compact heat engines such as flame quenching, leakage and severe heat dissipation, and they have great potential for improving the performance of micro-compact heat engines. Therefore, this paper proposes a multi-stage optimization model for the piston trajectory based on a nonlinear dynamical model coupled with an internal combustion engine and a linear motor, and it uses a Gaussian pseudospectral method and a sequential quadratic optimization algorithm to obtain an optimal solution for the piston trajectory that maximizes the indicated thermal efficiency of the system. The results show that, under different system parameters, the piston trajectory can improve the effective thermal efficiency of the system by 18.2–51.7 %, and the higher the sweeping pressure, the longer the combustion duration and the earlier the combustion onset, the more significant the effect of piston trajectory optimization on the thermal efficiency of the system.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109785"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262749","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

Integrated parametric and topologic design for advanced double-wall cooling systems 先进双壁冷却系统的综合参数和拓扑设计

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI: 10.1016/j.icheatmasstransfer.2025.109788

Li Yang, Kaibin Hu, Zecheng Wang, Shengquan Zhong

{"title":"Integrated parametric and topologic design for advanced double-wall cooling systems","authors":"Li Yang, Kaibin Hu, Zecheng Wang, Shengquan Zhong","doi":"10.1016/j.icheatmasstransfer.2025.109788","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109788","url":null,"abstract":"<div><div>Double-wall cooling is a high-performance strategy for turbine blade thermal protection, yet its design is challenged by complex internal–external flow interactions. This study proposes an integrated cooling configuration that combines self-organized turbulence structures with impingement and film cooling. The system is parameterized by 28 variables, including geometric parameters of cooling holes and control variables for turbulence-inducing topologies. A multi-objective Bayesian optimization framework is employed to simultaneously improve overall cooling effectiveness, uniformity, internal heat transfer, and pressure loss. Compared with three baseline configurations, the optimized designs enhance cooling effectiveness and uniformity by 17 % under equal pressure loss. Impingement and film cooling primarily drive effectiveness, while self-organized structures significantly improve uniformity. Data mining techniques reveal key design principles: aligning turbulence features with flow direction, minimizing solid connectivity in critical regions, and distributing cooling zones to extend flow paths. Designs guided by these principles achieve up to 16 % higher effectiveness and 58 % better uniformity than the baseline, even without further optimization. This integrated co-design framework provides an efficient and generalizable strategy for developing advanced double-wall cooling systems under complex thermal loads.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109788"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262259","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

Hydrogen enrichment effects on combustion dynamics and emissions in a hydrogen/methane combustor 氢气富集对氢/甲烷燃烧器燃烧动力学和排放的影响

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI: 10.1016/j.icheatmasstransfer.2025.109830

Duy-Tan Vo , Yoonhyeong Jeong , Van Chien Pham , Uideok Lee , Thi Thanh Giang Le , Hee Su Moon , Seong Kyun Im , Jaiyoung Ryu

{"title":"Hydrogen enrichment effects on combustion dynamics and emissions in a hydrogen/methane combustor","authors":"Duy-Tan Vo , Yoonhyeong Jeong , Van Chien Pham , Uideok Lee , Thi Thanh Giang Le , Hee Su Moon , Seong Kyun Im , Jaiyoung Ryu","doi":"10.1016/j.icheatmasstransfer.2025.109830","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109830","url":null,"abstract":"<div><div>The transition to hydrogen-enriched fuels in gas turbine combustors is critical for achieving sustainable energy goals, yet traditional combustor designs struggle to accommodate hydrogen's rapid combustion properties. This study investigates the combustion characteristics of a methane/hydrogen blend (0–40 % H<sub>2</sub> by volume) in a lean premixed W501F FlameSheet™ Combustor under constant heat input. Utilizing a partially premixed flamelet model coupled with turbulent shear stress transport k-omega and flamelet-generated manifold (FGM) approaches, the analysis focuses on flame dynamics, emission trends, and operational stability. The combustor's innovative design, inspired by the backward-facing step phenomenon, generates dual recirculation zones at the bend and pilot regions, acting as flow accelerators to stabilize flames and prevent flashback by maintaining a low-fuel-concentration buffer zone between injectors and ignition points. Results demonstrate robust flame stabilization at up to 40 % hydrogen, beyond which pilot-region instabilities emerge. The external tornado-shaped flame enveloping an independent internal flame enables precise temperature and load control. Hydrogen enrichment reduces CO<sub>2</sub> and CO emissions nonlinearly, with a 16.7 % CO<sub>2</sub> reduction at 40 % H<sub>2</sub>. However, dual temperature peaks at the combustor outlet suggest distinct heat transfer implications for turbine blades, warranting further study. These findings provide actionable insights for designing hydrogen combustors that balance performance and durability.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109830"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262262","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

Study on the influence of surface microstructure of hydrofoil on cavitation characteristics 水翼表面微观结构对空化特性影响的研究

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI: 10.1016/j.icheatmasstransfer.2025.109829

Ye Cai , Yunqing Gu , Yun Ren , Longbiao Ma , Chengqi Mou , Qianfeng Qiu , Denghao Wu , Zhenxing Wu , Jiegang Mou

{"title":"Study on the influence of surface microstructure of hydrofoil on cavitation characteristics","authors":"Ye Cai , Yunqing Gu , Yun Ren , Longbiao Ma , Chengqi Mou , Qianfeng Qiu , Denghao Wu , Zhenxing Wu , Jiegang Mou","doi":"10.1016/j.icheatmasstransfer.2025.109829","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109829","url":null,"abstract":"<div><div>In order to better suppress the occurrence of cavitation, a hydrofoil model based on microjet structure and micro-wedge structure was established. The modified turbulence model shear stress transport (SST) <em>k-ω</em> is used to simulate the hydrofoil. By analyzing the vorticity distribution, flow field streamline, cavitation morphology, vortex structure and velocity vector distribution, the difference between the control effects of two kinds of airfoil surface microstructure on cavitation flow is studied, and the mechanism of micro wedge structure and micro jet structure on cavitation flow on airfoil surface is revealed. The results show that both microstructures show the suppression of vorticity distribution. The micro-wedge structure suppresses cavitation by affecting the turbulent kinetic energy of the near wall, the streamline vortex of the far wall and the vortex structure, accelerates the shedding and collapse of cavitation, and reduces the distribution of the low pressure region. When the chordwise position is 3.5 mm, the cavitation suppression effect is the most obvious. The microjet structure can affect the vortex motion on the far wall and hinder the upward development of the re-entrant jet. The larger the tangential jet ratio is, the stronger the jet intensity is. When the tangential jet ratio is 0.3 and 0.4, the suppression effect of the vortex motion is significant, the length of the low pressure distribution is smaller, and the shedding cavitation is accelerated from large scale to small scale.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109829"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262264","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

Thermal analysis of freeze-drying process with mass transfer of water vapor: Volumetric heating approach 水蒸气传质冷冻干燥过程的热分析：体积加热法

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-09 DOI: 10.1016/j.icheatmasstransfer.2025.109767

Vikas Chaurasiya , Jitendra Singh

{"title":"Thermal analysis of freeze-drying process with mass transfer of water vapor: Volumetric heating approach","authors":"Vikas Chaurasiya , Jitendra Singh","doi":"10.1016/j.icheatmasstransfer.2025.109767","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109767","url":null,"abstract":"<div><div>The current work deals with a heat and mass transfer problem describing the freeze-drying process of a phase-change material in a one-dimensional semi-infinite porous medium, which is divided into three regions: prefreezing, primary drying, and secondary drying. The effect of convection on drying rate, induced by residual mass transfer of the water vapor within the desorbed region, followed by the convective term driven by mass transfer of the water vapor within the sublimated region, is considered. An internal heat generation in terms of a volumetric heat source is also accounted for. In addition, fixed and time-dependent boundary conditions are the driving functions at the surface <span><math><mrow><mi>x</mi><mo>=</mo><mn>0</mn></mrow></math></span> that cause freeze-drying to occur. The exact treatment of the mathematical model is carried out via similarity transformation. The present analytical work shows excellent agreement with previous available works. It is found that after the end of the sublimation of the material through a porous medium, only a small amount of water is available for desorption. Moreover, a volumetric heat source produces a faster desorption rate than usual. With the heat flux condition, the Kirpichev number shows a pronounced impact on the temperature field and evolution rate of the sublimation and desorption interfaces.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109767"},"PeriodicalIF":6.4,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262263","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

The thermal management performance of the PCM-based pin fin heat sink under the transient heat flux shock conditions:An experimental study 瞬态热流冲击条件下pcm引脚翅片散热器热管理性能的实验研究

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-10-09 DOI: 10.1016/j.icheatmasstransfer.2025.109809

De-Xin Zhang , Lai-Shun Yang , Xiao Lu

{"title":"The thermal management performance of the PCM-based pin fin heat sink under the transient heat flux shock conditions:An experimental study","authors":"De-Xin Zhang , Lai-Shun Yang , Xiao Lu","doi":"10.1016/j.icheatmasstransfer.2025.109809","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109809","url":null,"abstract":"<div><div>Phase change materials (PCMs) exhibit significant potential and outstanding performance in delaying the temperature rise of electronic devices and ensuring their safety during thermal shock events. Therefore, understanding the thermal management characteristics of PCM-based composite heat sinks under unsteady high heat flux conditions is crucial for effective thermal regulation and protection of electronic devices. Furthermore, to address the inherent limitation of PCMs in terms of low thermal conductivity, this study introduces pin-fin structures characterized by high thermal conductivity and large specific surface area. Experimental investigations were conducted to examine the effects of varying pin-fin numbers, constant pin-fin base area, and different thermal shock frequencies on the thermal performance of the composite system, with comparative analysis against conventional pure PCM heat sinks. Results demonstrate that, under high heat flux impact, the PCM-based pin-fin heat sink exhibits superior temperature control performance compared to the traditional pure PCM system. An optimal number of pin-fins exists that yields the best thermal regulation effect; when the number of pin-fins is around 25, the peak temperature is reduced by nearly 30 °C compared to the pure PCM system. The optimal thermal control performance occurs during the first thermal shock, while the performance gradually degrades with increasing shock cycles. It should be noted that future research should focus on developing advanced composite thermal control technologies capable of maintaining stable and efficient thermal performance under multiple unsteady thermal shocks.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109809"},"PeriodicalIF":6.4,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262859","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