International Communications in Heat and Mass Transfer最新文献

{"title":"Numerical investigations on the heat transfer characteristics of pin-fin heat sink for power converters in more electric aircraft","authors":"Feng Han ,&nbsp;Zhuxuan Jiang ,&nbsp;Honghua Chen ,&nbsp;Junkui Mao ,&nbsp;Xiaofeng Ding","doi":"10.1016/j.icheatmasstransfer.2025.108866","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108866","url":null,"abstract":"<div><div>Efficient cooling of high-power density converters is critical for the aerospace industry. This study investigates a 40-kW aviation power converter and examines the heat transfer (HT) characteristics of pin-fin heat sinks under specific operating conditions. The effects of the height-to-diameter ratio (<span><math><msub><mi>r</mi><mi>h</mi></msub></math></span>), relative spanwise spacing (<span><math><msub><mi>r</mi><mi>s</mi></msub></math></span>), relative streamwise spacing (<span><math><msub><mi>r</mi><mi>x</mi></msub></math></span>), and Reynolds number (<em>Re</em>) on HT performance are analyzed. When the pin-fin diameter is fixed, the average Nusselt number (<span><math><mover><mi>Nu</mi><mo>¯</mo></mover></math></span>) of the pin-fin surface (PFS) is consistently 40 %–70 % higher than that of the end wall. Both <span><math><mover><mi>Nu</mi><mo>¯</mo></mover></math></span> levels on the PFS and end wall increase as <em>Re</em> increases. The thermal performance index (TPI) and improved thermal performance index (TPI’) both initially increase and then decrease with increasing <span><math><msub><mi>r</mi><mi>h</mi></msub></math></span> when <span><math><mo>Re</mo></math></span> ≤ 10,000, while they consistently decrease with increasing <span><math><msub><mi>r</mi><mi>h</mi></msub></math></span> when 15,000 ≤ <span><math><mo>Re</mo></math></span>≤25,000. Additionally, the friction coefficient and resistance enhancement coefficient increase as <span><math><msub><mi>r</mi><mi>h</mi></msub></math></span> varies from 4 to 20. The optimal heat sink structure is identified as having a pin-fin diameter of <em>D</em> = 6 mm, a height-to-diameter ratio of <span><math><msub><mi>r</mi><mi>h</mi></msub></math></span> = 10, a relative spanwise spacing of r_s = 3, and a relative streamwise spacing of <span><math><msub><mi>r</mi><mi>s</mi></msub></math></span> = 3 and <span><math><msub><mi>r</mi><mi>x</mi></msub></math></span> = 2.5, respectively.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108866"},"PeriodicalIF":6.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628866","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}

{"title":"Compartive statistical analysis with buoyancy effects on partitioned cavity","authors":"Mizanur Rahman ,&nbsp;Mohammad Mokaddes Ali ,&nbsp;Rehena Nasrin ,&nbsp;Shaikh Mahmuda ,&nbsp;Rajeeb Hossain","doi":"10.1016/j.icheatmasstransfer.2025.108843","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108843","url":null,"abstract":"<div><div>The study of buoyancy effects in partitioned cavities has gained significant attention due to its relevance in numerous engineering and industrial applications, such as energy storage systems, electronic cooling devices, and thermal management solutions. Investigating the influence of key parameters such as Grashof number, Reynolds number, Hartmann number, and Prandtl number on heat transfer and fluid flow and bridging the knowledge gap by systematically examining computational results and statistical interpretations. Few works provide a detailed comparative analysis of buoyancy effects across various geometrical and physical parameters. Existing studies primarily focus on qualitative and computational results without integrating statistical methodologies to analyze trends and correlations. The governing equations are rendered dimensionless and numerically solved using the finite element method (FEM). The grid test and code validation criteria are established to ensure accurate solution convergence. The numerical results, presented visually for various dimensionless parameters, encompass heat transfer distributions, temperature, and velocity. At <em>Re</em> = 200, the heat transfer rate is 28.16 % greater than at <em>Re</em> = 50. At <em>Ha</em> = 50, it is 2.34 % lower than at <em>Ha</em> = 0. Furthermore, this study yields novel linear regression equations, ANOVA analysis, and predicted and residual values that are represented numerically and graphically. Based on R-squared values of 0.9523 for each, the heat transfer rates the Statistic linear regression algorithm achieves are extraordinarily high. This analysis is crucial for optimizing design parameters, improving energy efficiency, and enhancing thermal performance in real-world applications such as energy storage systems, electronics cooling, HVAC systems, renewable energy, and industrial processes.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108843"},"PeriodicalIF":6.4,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619397","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}

{"title":"Theoretical and experimental study of the heterogeneous bubble nucleation in boiling of pure liquids and binary mixtures based on Gibbs free energy analysis and heated surface characteristics","authors":"Liang Liu ,&nbsp;Le Liu ,&nbsp;Ying Xu ,&nbsp;Yan Li ,&nbsp;Hui Han ,&nbsp;Yuxing Li ,&nbsp;Jianlu Zhu","doi":"10.1016/j.icheatmasstransfer.2025.108844","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108844","url":null,"abstract":"<div><div>The onset of nucleate boiling (ONB) conditions significantly impact the performance of boiling heat transfer. Predicting and optimizing these conditions is crucial in various industrial applications. In this paper, the nucleation critical conditions for the heterogeneous boiling nucleation of both pure liquids and mixed liquids are established based on the stricter critical nucleation criterion of dΔ<em>G</em>^hetero/d<em>r</em> = 0. Additionally, a computation approach for predicting the ONB conditions of heterogeneous boiling in non-visible situations is developed by considering the characteristics of heated surface morphology and heat transfer. An experimental setup is constructed to validate the computational method by measuring the ONB superheat and heat flux of pure liquid and binary mixtures. The results demonstrate that the error between the model calculations and experimental values is within the range of ±20 %. Moreover, insights into the control mechanism of regular cavity surfaces on ONB conditions and nucleation sites are obtained, leading to the development of techniques for manipulating surface conditions to optimize the ONB. The findings reveal that as the wall superheat increases, the surface with regular micro-cavities shows a significantly lower transient change in nucleation density.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108844"},"PeriodicalIF":6.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611017","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}

{"title":"Synergistic effects of vortex generators and elastic walls on enhancement of heat transfer in microchannels","authors":"Farzad Havasi ,&nbsp;Seyyed Hossein Hosseini ,&nbsp;Sajjad Ahangar Zonouzi ,&nbsp;Abdolhamid Azizi","doi":"10.1016/j.icheatmasstransfer.2025.108855","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108855","url":null,"abstract":"<div><div>Microchannel heat sinks are highly effective methods for thermal management in various applications, such as electronic cooling, power generation, and microfluidics. There are no studies in the existing literature regarding the influence of integrating elastic walls and vortex generators on the thermal efficiency of microchannels. This study accomplished a set of reliable numerical simulations to evaluate the influences of elastic walls and different vortex generators on flow dynamics and heat transfer, to enhance microchannel performance. Consequently, the Arbitrary Lagrangian–Eulerian method was applied for all simulations. Therefore, five microchannel configurations were tested: a standard microchannel, one featuring a circular vortex generator, another with an elastic wall, and a design that integrates elastic walls with both circular and crescent vortex generators. The dynamics and heat transfer within these systems were carefully examined and assessed. The numerical findings indicated that the updated design featuring two crescent-shaped vortex generators and a flexible wall improves the heat transfer rate by approximately 20.15 %, resulting in a thermal performance ratio (TPR) of 1.203. This study introduces a novel design approach that significantly improves thermal efficiency and provides valuable insights for upcoming uses in microchannels.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108855"},"PeriodicalIF":6.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611018","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}

{"title":"A numerical simulation of microclimate regulation using multi-physics fields coupling model","authors":"Pengju Yang ,&nbsp;Min Chen ,&nbsp;Haowen Jia ,&nbsp;Qiang Guo","doi":"10.1016/j.icheatmasstransfer.2025.108799","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108799","url":null,"abstract":"<div><div>Greenhouse agriculture transcends the constraints of traditional farming, significantly enhancing the efficiency and sustainability of agricultural production through a controlled environment. Aiming at the challenges of thermal dynamic balance in microclimate control within greenhouses, a multi-physics field coupling model is presented for modeling the distribution of temperature and wind speed inside a glass greenhouse, in which the energy equation is integrated with the realizable k-epsilon turbulence model. This article is focused mainly on the influence of porous media, solar radiation, and wind speed of air supply jets on the distribution of temperature and wind speed in greenhouse microclimate systems. In numerical simulations, the distribution of greenhouse temperature and wind speed fields under different configurations is presented and discussed in detail. Numerical simulations indicate that porous media plays an important role in regulating temperature and stabilizing wind speed in greenhouses. In addition, a plant growth suitability rate as a numerical evaluation index is introduced to quantitatively assess the microclimate regulation system. This article can provide valuable assistance for deploying glass greenhouse, offering valuable insights for the greenhouse cultivation sector.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108799"},"PeriodicalIF":6.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611019","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}

{"title":"Experimental estimation of core temperature and directional thermophysical properties for cylindrical lithium-ion battery utilizing an innovative thermal interrogation method","authors":"Mohammed A. Alanazi","doi":"10.1016/j.icheatmasstransfer.2025.108827","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108827","url":null,"abstract":"<div><div>The research focuses on the importance of estimating the core temperature and directional thermophysical properties of lithium-ion batteries to enhance performance and safety, as the choice and design of proper thermal management systems depend on these factors. Therefore, the aim of this research is to develop a new experimental noninvasive battery thermal interrogation model based on the lumped capacitance method to estimate the battery core temperature, specific heat capacity, and directional thermal conductivities without environmental interference. This method utilizes a combination of directional (radial and axial) experimental real-time transient surface heat flux and temperature measurements on the outside of the cylindrical lithium-ion (18650) battery cell surface. Unlike the literature thermal methods, this method does not depend on the external environmental effects because the heat flux sensor is mounted underneath the thin-film polyimide electric heater and it measures the real-time transient heat flux to the battery cell. Moreover, the heat flux measurements are used as input in the transient thermal model rather than the temperature measurements to provide a good estimation of the battery core temperature and the battery directional thermophysical properties. A simple parameter estimation algorithm is used to estimate the optimal parameters by using the minimum root mean square error between the analytical and experimental difference in directional surface temperature values. The results are compared with other different methods, such as two-state thermal method, inverse heat conduction thermal method, and Kalman filter method. The results demonstrate that the proposed method accurately captured the battery core temperature, the specific heat capacity, and the directional thermal conductivity values with small standard deviation and minimum 95 % confidence interval. This proposed method can be applied to different geometries and chemistries of lithium-ion batteries.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108827"},"PeriodicalIF":6.4,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600590","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}

{"title":"Numerical simulation on particle deposition characteristics and mechanism of turbine blade with film cooling","authors":"Fei-Long Wang,&nbsp;Jia-Wei Zeng,&nbsp;Jun-Kui Mao,&nbsp;Yu-Bin Wang","doi":"10.1016/j.icheatmasstransfer.2025.108826","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108826","url":null,"abstract":"<div><div>The ingress of particles into aircraft engines, leading to deposition on turbine blade surfaces, poses a significant threat to engine reliability by potentially obstructing film cooling holes. This paper investigated the deposition characteristics of C3X blades with film cooling, aiming to address the limitations of existing models and provide deeper insights into the underlying mechanisms. To achieve this, the existing deposition model was improved by incorporating the deposition rate and considering particle secondary collision-deposition based on EI-Batsh's critical velocity model, thereby enhancing prediction accuracy. Using the improved model, the effects of particle diameter and blowing ratio on deposition characteristics were systematically analyzed. Additionally, the dynamic mesh method was employed to simulate the morphology of the deposition layer. The result shows that the deposition mass peaks at a particle diameter of 6 μm, with multiple deposition peaks observed for particles larger than 8 μm. Increasing the blowing ratio promotes a more uniform deposition layer on the blade's leading edge while creating non-deposition regions on the pressure side. Notably, the blowing ratio has a more pronounced effect on larger particles (&gt;6 μm), and appropriately increasing it can effectively reduce deposition. This work provides theoretical support for the subsequent prediction of sedimentary properties.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108826"},"PeriodicalIF":6.4,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600589","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}

{"title":"A stress-dependent fractal model for predicting the effective thermal conductivity of porous rocks with elliptical pore","authors":"Ruirui Wang ,&nbsp;Shanshan Yang ,&nbsp;Xiuya Guo ,&nbsp;Qian Zheng","doi":"10.1016/j.icheatmasstransfer.2025.108823","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108823","url":null,"abstract":"<div><div>The diverse pore morphologies of porous rocks make it challenging to quantitatively characterize the intrinsic mechanisms of the effective thermal conductivity (ETC) under stress conditions. However, previous fractal theory studies on the transport properties of stress-dependent porous rocks with elliptical cross-sections of adjustable aspect ratios have mainly focused on the permeability, with less attention given to the effective thermal conductivity. Therefore, this paper establishes a novel fractal model for the stress-dependent ETC in porous rocks that employs elliptical cross-sections with adjustable aspect ratios. The model derives the relationship between the stress-dependent ETC and pore structure parameters. The model's validity is confirmed by the error of only 2.83 % between the theoretical predictions and the experimental data. The parameter sensitivity analysis indicates that the ETC of stress-sensitivity porous rocks is related to the capillary initial fractal dimension, capillary initial aspect ratio, initial porosity, Young's modulus, and Poisson's ratio. It is discovered that Young's modulus of the porous rocks has the greater impact on ETC, showing a negative correlation with it. The fractal model clarifies heat transfer mechanisms porous rocks with elliptical pore under effective stress, with each parameter physically defined and independent of empirical constants.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108823"},"PeriodicalIF":6.4,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611016","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}

{"title":"Inner tube rotation decreases melting efficiency in a triple-tube latent heat storage system with a rotating middle tube","authors":"Amin Shahsavar,&nbsp;Aydin Shaham","doi":"10.1016/j.icheatmasstransfer.2025.108835","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108835","url":null,"abstract":"<div><div>Improving the performance of latent heat storage systems is essential because it can help to increase energy efficiency and reduce the consumption of fuel resources. These improvements will ultimately lead to more sustainable development of thermal systems and reduction of environmental impacts. In this study, a numerical investigation is conducted to determine whether a triple-tube latent heat storage system with a counter-clockwise rotating middle tube containing PCM performs better with a stationary or rotating interior tube containing hot water flow. The effect of the interior tube rotation speed (ranging from −2 to 2 rad/s in increments of 0.25 rad/s) on the time variation of overall and local values of the liquid fraction and temperature of the PCM was analyzed. The results showed that the system with a stationary interior tube outperformed those with a rotating interior tube in terms of melting efficiency. The PCM melting time for the system with a stationary interior tube was 481.8 s, while the shortest melting time among the rotating systems (486.6 s) occurred when the interior tube rotated clockwise at a speed of 2 rad/s. Conversely, the longest melting time (789 s) was observed when the interior tube rotated at 2 rad/s clockwise.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108835"},"PeriodicalIF":6.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593601","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}

{"title":"Effect of three-zone synergistic pattern on thermal resistance performance of wet cooling towers under crosswind","authors":"Xiaojing Yuan ,&nbsp;Weiran Shi ,&nbsp;Xue Song ,&nbsp;Jichong Yang ,&nbsp;Yang Liu ,&nbsp;Suoying He ,&nbsp;Ming Gao","doi":"10.1016/j.icheatmasstransfer.2025.108837","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108837","url":null,"abstract":"<div><div>Based on the distribution features of 3D flow and temperature fields in the tower under crosswind, a three-zone synergistic optimization pattern is established for the water-spraying zone, fillings zone and rain zone: elliptical partition water distribution, elliptical non-equidistant fillings layout, and non-centrosymmetric dry-wet hybrid rain zone. The numerical simulation method is employed to investigate the effect of the three-zone synergistic pattern under crosswind on the cooling tower thermal and resistance performance. The three-zone synergistic pattern, according to the results, optimizes the distribution of the multi-physical fields inside the cooling tower, and greatly improves the thermal and resistance performance of the tower at distinct crosswind speeds. Taking a typical wind speed <em>v</em> = 5 m/s under the design condition (the standard operating condition set during the design phase) as an example, the water temperature drop, cooling efficiency and ventilation of the cooling tower with the three-zone synergistic pattern under crosswind increase by 0.72 °C, 4.19 % and 335.74 kg/s, respectively, compared with the conventional cooling tower. This work can provide important references for the thermal design and technological transformation of large wet cooling towers under crosswind.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108837"},"PeriodicalIF":6.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593604","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}