International Communications in Heat and Mass Transfer最新文献

{"title":"Modeling the integration of a heat pipe evacuated tube system with paraffin for solar energy storage","authors":"M.J. Sarmadi ,&nbsp;M. Sheikholeslami","doi":"10.1016/j.icheatmasstransfer.2025.108994","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108994","url":null,"abstract":"<div><div>This article offers a numerical research into the melting within heat pipe-integrated evacuated tube solar collector, integrating advanced thermal enhancement techniques to improve energy storage efficiency. To optimize the thermal performance, two fin configurations—upward and downward—were incorporated into the phase change material (PCM) zone, where paraffin (RT27) was mixed with ZnO nanoparticles. The outputs demonstrated that the downward fin arrangement exhibited superior performance compared to the upward configuration. To further augment heat transfer, the downward fin was coupled with porous foam. The study employed SolTrace software to determine the heat flux received by the outer layer of the solar collector, ensuring precise boundary conditions for numerical modeling. The three-dimensional model was developed using ANSYS FLUENT, incorporating user-defined functions (UDFs) to dynamically capture the thermophysical property variations of the PCM. A piecewise linear approach was utilized to account for phase-dependent properties. Also, the density variation with temperature in the liquid phase has been applied ensuring a more accurate representation of natural convection effects. Simulation results revealed that transitioning from an upward to a downward fin configuration led to an increase of approximately 4.1 % in the liquid fraction (LF) and a 3.46 % rise in the average PCM temperature (T_PCM). Moreover, integrating the downward fins with porous foam resulted in a remarkable 24.85 % enhancement in the liquid fraction due to the superior thermal conduction characteristics of this configuration. This enhancement is particularly beneficial during the solidification process when solar irradiation is absent, ensuring a more stable energy storage unit. In the optimal arrangement, as the operating time increased from 20 min to 100 min, the temperature of the paraffin zone and the water zone rose by 15.31 % and 8.64 %, respectively, underscoring the system's effectiveness in heat retention and transfer.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"165 ","pages":"Article 108994"},"PeriodicalIF":6.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898667","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":"Response to Dr. M. M. Awad's comments","authors":"M.U. Hafeez ,&nbsp;T. Hayat ,&nbsp;A. Alsaedi ,&nbsp;Muhammad Imran Khan","doi":"10.1016/j.icheatmasstransfer.2025.108985","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108985","url":null,"abstract":"<div><div>This response addresses Dr. M. M. Awad's observations on the Prandtl number values in our study, clarifies their basis in hybrid nanofluid thermophysics, and reaffirms the validity of the qualitative trends and conclusions.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108985"},"PeriodicalIF":6.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916101","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":"Comments on “Numerical simulation for electrical conducting rotating flow of Au (Gold)-Zn (Zinc)/EG (Ethylene glycol) hybrid nanofluid”","authors":"M.M. Awad","doi":"10.1016/j.icheatmasstransfer.2025.108984","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108984","url":null,"abstract":"<div><div>The used Prandtl number (<em>Pr</em>) values are incorrect.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108984"},"PeriodicalIF":6.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916099","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":"Corrigendum to “Investigation of the heat transfer of a singleU-tube borehole heat exchanger formedium-shallow geothermal energy” [Volume 162 (2025) 108644]","authors":"Yuxue Gao ,&nbsp;Wenke Zhang ,&nbsp;Haiqing Yao ,&nbsp;Zenggang Zhang ,&nbsp;Ping Cui ,&nbsp;Mingzhi Yu","doi":"10.1016/j.icheatmasstransfer.2025.108889","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108889","url":null,"abstract":"","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108889"},"PeriodicalIF":6.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916100","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":"Battery thermal management systems by using DI water and PCF with Nano-encapsulated Tetradecan-1-ol for Lithium-ion batteries","authors":"P.M. Sutheesh,&nbsp;Roshen Thomas,&nbsp;Rohinikumar Bandaru","doi":"10.1016/j.icheatmasstransfer.2025.108992","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108992","url":null,"abstract":"<div><div>Lithium ion battery (LIB) is the major power source in electric vehicles (EVs) and its thermal management is essential. Present study explores thermal regulation of LIB utilizing phase change fluid (PCF) which consists of nano encapsulated phase change material (NEPCM) in base fluid, specifically Tetradecan-1-ol encapsulated in polymethyl methacrylate. Three-dimensional model is developed for three different designs of battery pack (BP) and simulated with 0 to 7 % concentration of NEPCM, 1C to 5C cell discharge and with Reynolds number (<em>Re</em>) of 121.09 to 1937.52 using PCF and deionized (DI) water coolants. BP-2 with PCF is the best combination for thermal management among different configurations and phase transition process of PCM was effectively used in it. At lowest <em>Re</em> and highest discharge, PCF has superior performance than DI water due to optimisation in phase transition of PCF at reduced pumping power. DI water fails to regulate the system at 5C and lower <em>Re</em> of 3C. Inclusion of 4 % NEPCM reduces 47 K and 79.64 % in maximum temperature and temperature difference, respectively and increases convection HTC by 6.15 times compared to DI water in BP-2 at <em>Re</em> of 121.09 and 5C discharge. It is found that cell discharge rate significantly influences figure of merit (FOM) and coefficient of performance (COP) than the concentration of NEPCM across various coolant dynamic conditions. The change in C-rate is significantly reflected in FOM and COP at lowest <em>Re</em> of 121.09, reaching a magnitude of 198.01and <span><math><mn>1.83</mn><mo>×</mo><msup><mn>10</mn><mn>6</mn></msup></math></span>, respectively with 2 % NEPCM at 5C discharge.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"165 ","pages":"Article 108992"},"PeriodicalIF":6.4,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887218","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 stochastic numerical analysis for viscoelastic fluid traversing a permeable perpendicular surface","authors":"Muhammad Asif Zahoor Raja ,&nbsp;Atifa Latif ,&nbsp;Mariyam Shamim ,&nbsp;Kottakkaran Sooppy Nisar ,&nbsp;Muhammad Shoaib","doi":"10.1016/j.icheatmasstransfer.2025.108996","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108996","url":null,"abstract":"<div><div>This research endeavors to fill the existing void by performing numerical analysis of the behavior of Maxwell fluids on perpendicular surface embedded within porous medium, both chemical reactions and thermal generation taking into account. The study additionally encompasses thorough analysis of mass and energy transfer mechanisms integral to (MHD) magneto hydrodynamic Maxwell fluids. The PDEs, partial differential equations, obtained through the problem have been changed into ODEs, ordinary differential equations, by applying specific similarity transformations. Transformed equations have then resolved using bvp4c solver within the MATLAB bvp4c function. To check validity of bvp4c function Levenberg Marquardt algorithm through backward propagation has been applied. The results have compared and contrast graphically with the effects of physical parameters emerging the mathematical model, such as chemical reactions, energy production and Deborah number parameters on temperature, velocity, and concentration, presenting the results in graphical format. Sherwood numbers and skin friction coefficients exhibit an upward trend with increased chemical reaction intensity, whereas local Nusselt numbers show a decline as chemical reactions become more dominant. Through examination of Maxwell fluid flow with chemical reactions, this study aids in optimizing processes, improving product quality, and offering more profound understanding of dynamics of complex fluids in practical applications.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"165 ","pages":"Article 108996"},"PeriodicalIF":6.4,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891914","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":"Film cooling effectiveness in the presence of internal hole random roughness: A comprehensive analysis","authors":"Xinyu Wang ,&nbsp;Lin Ye ,&nbsp;Wei Li ,&nbsp;Tianyi Zheng ,&nbsp;Xiyuan Liang ,&nbsp;Cunliang Liu","doi":"10.1016/j.icheatmasstransfer.2025.108990","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108990","url":null,"abstract":"<div><div>Film cooling, with its excellent cooling performance, is widely applied in the active thermal protection design of aerospace propulsion systems. However, during manufacturing and service, film holes are affected by drilling processes and particle deposition, leading to significant deviations between the actual cooling structures and the original design. These deviations primarily manifest as hole blockage and increased surface roughness, which may cause cooling degradation. Therefore, it is essential to investigate the film cooling performance under structural damage and the jet-mainstream mixing mechanisms of damaged holes. This study focuses on internal roughness as a form of structural damage by investigating three levels of hole roughness—<em>Ra</em> = 3.1 μm (Film hole I), <em>Ra</em> = 35.9 μm (Film hole II), and <em>Ra</em> = 64.9 μm (Film hole III). The selected roughness levels and blowing ratios correspond to the practical range encountered in turbine cooling. The film cooling effectiveness distribution is measured using pressure-sensitive paint technology, and numerical simulations are conducted to analyze the flow field and support the experimental results. The results indicate that cooling degradation caused by internal roughness is mainly reflected in the reduction of high cooling effectiveness areas and the deterioration of cooling performance near the film hole exit. However, increased roughness also leads to an expansion of the film coverage in the spanwise, enhancing cooling performance downstream. Flow field analysis reveals that internal roughness increases the inhomogeneity of coolant velocity distribution inside the hole, strengthening the counter-rotating vortex pair and causing jet lift-off, which reduces the high cooling effectiveness area. Additionally, roughness-induced disturbances enhance turbulence intensity, promoting jet-mainstream mixing and increasing the overall film coverage.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"165 ","pages":"Article 108990"},"PeriodicalIF":6.4,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891822","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 study on mechanisms underlying the heat transfer enhancement of upward supercritical CO2 flow at low Reynolds numbers near the pseudo-critical region through a microtube","authors":"Ergin Bayrak ,&nbsp;Hojin Ahn","doi":"10.1016/j.icheatmasstransfer.2025.108995","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108995","url":null,"abstract":"<div><div>The buoyancy and thermal acceleration effects of supercritical CO₂ flow near the pseudo-critical region have been widely mentioned as the mechanism of heat transfer enhancement in the literature. However, most publications deal with turbulent flows and do not discuss the details of how these effects alter flow structure and enhance heat transfer. The present study numerically investigated mechanisms underlying the heat transfer enhancement of upward supercritical CO₂ flow through a microtube, 0.5 mm in diameter, at low Reynolds numbers. The heat transfer enhancement was closely associated with the appearance and disappearance of the M-shaped velocity profile. When the M-shaped profile started forming by the buoyancy effect, the first local maximum of the heat transfer coefficient appeared as the thermal acceleration of the boundary layer entrained fluid from the wall region. The fluid entrainment carried thermal energy from the wall toward the core, thus enhancing the heat transfer. When the M-shaped profile started disappearing due to the thermal acceleration in the core region, the second maximum appeared in some cases due to abrupt turbulence developed by two forces in the opposite direction: one force dragging the local maximum velocity in the M-shaped profile and the other force accelerating the core region.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"165 ","pages":"Article 108995"},"PeriodicalIF":6.4,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887219","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":"Enhanced heat transfer on hollow hierarchical nanowired surface during transient spray cooling of liquid nitrogen","authors":"Yiming Fan ,&nbsp;Fengmin Su ,&nbsp;Jiahui Peng ,&nbsp;Letian Fan ,&nbsp;Chao Chang ,&nbsp;Yulong Ji ,&nbsp;Rongfu Wen ,&nbsp;Guoliang Zhu","doi":"10.1016/j.icheatmasstransfer.2025.108982","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108982","url":null,"abstract":"<div><div>The liquid spreading and replenishment has a key effect on the performance of transient spray cooling. In this study, we used liquid nitrogen as the working fluid and conducted transient spray cooling experiments on four modified copper surfaces, including superhydrophilic surface, hydrophilic surface, smooth copper surface, and hollow hierarchical nanowired surface. The results show that increasing the single-scale surface hydrophilicity of the copper surface can effectively increase the critical heat flux (CHF) of liquid nitrogen transient spray cooling, due to the effective enhancement of evaporation heat transfer coefficient <em>h</em>. The multi-scale hollow hierarchical structure surface can further enhance the heat transfer of liquid nitrogen transient spray cooling, its cooling rate is accelerated 1.3 times, the CHF is increased 1.2 times and the maximum <em>h</em>_<em>MAX</em> is increased 1.11 times that of the superhydrophilic surface. Through the calculation of the liquid film climb theory model, it was found that the liquid nitrogen film climbs at a speed of 48.10 m/s in the nanowired clusters. The ultrafast climb of liquid nitrogen film in hierarchical nanowires may be one of the main reasons for enhanced heat transfer. This study broadens the experimental database of hierarchical structure surfaces and new ideas on enhanced heat transfer during cryogenic spray cooling.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"165 ","pages":"Article 108982"},"PeriodicalIF":6.4,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882430","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":"Transpiration cooling performance of carbon fiber oxidation-induced Mullite/Al2O3 porous ceramic composite for hypersonic vehicles","authors":"Andi Lin,&nbsp;Jie Huang,&nbsp;Buyue Zhao,&nbsp;Haiming Huang","doi":"10.1016/j.icheatmasstransfer.2025.108991","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108991","url":null,"abstract":"<div><div>As a candidate for active thermal protection in next-generation hypersonic vehicles, transpiration cooling technology has an excellent capacity to reduce heat. However, it remains constrained by material scarcity with simultaneously adapted permeability and high-temperature endurance. To address this critical bottleneck, we developed an innovative Mullite fiber reinforced Al₂O₃ (Mullite/Al₂O₃) porous ceramic through a carbon fiber oxidation-induced approach combined with grinding-mold pressing-sintering process. The comprehensive properties of the ceramic, such as permeability, pore size distribution, high-temperature resistance, and thermal shock resistance, were systematically investigated. The results showed that the Mullite/Al₂O₃ porous ceramic features low density (1.35 g/cm³), good permeability (1.79 × 10⁻¹³ m²), uniform pore size distributions (3.6–10.3 μm), and excellent temperature resistance (&gt;1500 °C). After 10 thermal shock cycles (1500 °C to 20 °C quenching), the ceramic retained 65.9 % of its initial compressive strength (31.08 MPa) and 52.0 % of its initial flexural strength (13.25 MPa). In addition, oxyacetylene flame tests on nose cones demonstrated remarkable transpiration cooling efficiency under 5.3 MW/m² heat flux. This study demonstrates the effectiveness of the synergistic fabrication strategy integrating carbon fiber oxidation-induced pore generation with mullite fiber reinforced architecture, validating the exceptional performance and thermal protection capacity under extreme aerodynamic heating conditions, providing a viable solution for hypersonic thermal protection systems.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"165 ","pages":"Article 108991"},"PeriodicalIF":6.4,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882428","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}