International Communications in Heat and Mass Transfer最新文献

{"title":"Transient numerical investigation on coupled heat transfer of regenerative cooling channels with typical lattice sandwich structures","authors":"Shibin Luo,&nbsp;Zhongding Tang,&nbsp;Jiawen Song,&nbsp;Jun Liu,&nbsp;Daiwei Li","doi":"10.1016/j.icheatmasstransfer.2025.109751","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109751","url":null,"abstract":"<div><div>To meet the growing requirements of thermal protection for scramjet engines, two typical lattice structures, Kagome and pyramid, are applied to the regenerative cooling channel. This paper presents a transient numerical investigation of coupled heat transfer for lattice sandwich cooling channels. The results indicate that under identical pressure drop, heat flux, and coolant flow conditions, compared to the traditional rectangular channel, the maximum temperatures of the back side wall for the two lattice channels decrease by 40.6 % and 39.2 %, respectively, with a faster temperature response rate. However, the maximum temperatures of gas side wall for the two lattice channels are 9.2 % and 10.2 % higher than that for the rectangular channel, potentially increasing the risk of overtemperature damage. Notably, under the same conditions of relative density for cooling channels and contact area between the lattice core and the bottom panel, the heat transfer calculation results for Kagome lattice channel and pyramid lattice channel are almost similar.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109751"},"PeriodicalIF":6.4,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262869","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":"Energy dissipation mechanism of femtosecond laser ablation of DLC/Ti/TiN multilayer heterogeneous films","authors":"Junjie Liu ,&nbsp;Chang Liu ,&nbsp;Lei Gao ,&nbsp;Sinan Liu","doi":"10.1016/j.icheatmasstransfer.2025.109822","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109822","url":null,"abstract":"<div><div>Ultra-hard multilayer heterostructured diamond-like carbon (DLC)/Ti/TiN thin films, featured by their unique multi-interfacial architecture and excellent wear resistance integrated with thermal impedance properties, have been developed as composite anti-friction and wear-resistant microfilms for complex working conditions. Femtosecond laser-controlled ablation has emerged as a key technology for precise micro-nano machining of such thin-film materials, with energy dissipation serving as the fundamental mechanism governing controlled ablation. However, the underlying physical mechanisms remain poorly understood. Herein, the femtosecond laser ablation of DLC/Ti/TiN films was investigated via integrated ablation experiments, multi-scale finite element modeling, and advanced characterization techniques (FIB, SEM, EDS), aiming to reveal the energy dissipation dynamics that govern material removal and structural evolution. Firstly, a proposed model simulates the energy transfer characteristics (deposition, absorption, diffusion) during femtosecond laser ablation and calculates the specific electron explosion force. For the first time, the energy distribution ratios among the three dominant interaction mechanisms (thermal conduction, plasma formation, and electron explosion force) are quantified. This quantification unveils their nonlinear dependence on laser energy. Detailed characterizations of inverted conical blind holes and diffusion zones confirm that plasma recoil dominates material ejection, while electron explosion forces drive interfacial delamination. The splashing morphology and crack propagation are correlated with recoil pressure gradients and Coulomb repulsive stress waves, and the redeposited particles at hole openings verify momentum dissipation during axial ejection. Furthermore, non-thermal mechanisms are identified to maintain structural integrity: Raman spectroscopy reveals graphitization of DLC without interfacial delamination, and EDS analysis confirms extremely low oxidation levels, as plasma-dominated material removal limits oxidation. As a result, femtosecond ablation induces only local phase transitions and minimal structural damage in multilayer films. Finally, this research provides a solid theoretical foundation for controlled femtosecond laser micro-nano manufacturing of DLC/Ti/TiN thin films, highlighting the critical role of energy dissipation dynamics in guiding process optimization and material design.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109822"},"PeriodicalIF":6.4,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262750","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":"Large eddy simulation of flame stabilization in a hollow supersonic combustor with parallel-cavity","authors":"Kaijing Jia ,&nbsp;Chibing Shen ,&nbsp;Zhiqun Meng ,&nbsp;Haoming He ,&nbsp;Zhuoling Liu ,&nbsp;Luchang Liu","doi":"10.1016/j.icheatmasstransfer.2025.109816","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109816","url":null,"abstract":"<div><div>A square (SQ), rectangular (RE) and circular (CI) hollow supersonic combustor with parallel-cavity is proposed and investigated on the base configuration (BC) design by large eddy simulation (LES). At the parallel-cavity, the high temperature flame and subsonic zones are larger in RE than those in SQ and CI, but do not develop as well downstream as in SQ and CI. The total pressure recovery in CI is 0.70, which is the smallest total pressure loss among the four configurations. The fuel has high penetration ability and significant diffusion downstream in SQ and CI. The heat release power (<em>HRP</em>) of supersonic and diffusion combustion in SQ is 186.0 kW and 245.5 kW respectively, and the total <em>HRP</em> is 286.9 kW, which are the highest among the four configurations, increasing by 2.0 % compared to RE, 36.5 % compared to CI, and 3.5 % compared to BC. The rectangular and circular hollow walls facilitate supersonic-diffusion and supersonic-premixed combined combustion modes, respectively. There is better combustion with a pronounced peak of heat release in SQ, and a concentrated heat release in RE, while the heat release in CI is smoother throughout the space.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109816"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262254","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":"Dehumidification induced thermal behaviour and efficiency analysis of T shaped porous metallic fin: A semi analytical approach using Homotopy Perturbation Method","authors":"P.L. Pavan Kumar ,&nbsp;B.J. Gireesha ,&nbsp;P. Venkatesh","doi":"10.1016/j.icheatmasstransfer.2025.109814","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109814","url":null,"abstract":"<div><div>The novelty of this study lies in applying the Homotopy Perturbation Method (HPM) to analyse T-shaped porous metallic fin under dehumidification, a configuration that has not been explored in previous works. The research provides a comprehensive thermal and efficiency analysis of fin made of Copper (Cu) and Aluminium (Al), where condensation-driven heat and mass transfer within the porous medium is represented through Darcy's law. The governing nonlinear differential equations for the stem and flange regions are solved using HPM, with results validated against established literature. The thermal behaviour analysis shows that the stem maintains a higher temperature due to dominant axial conduction, rising by 14.62 % for Al and 8.64 % for Cu, while the flange remains relatively uniform with lower temperature gains of 0.23 % and 0.14 %. Cu fin outperform Al fin due to higher thermal conductivity, showing 8.64 % and 0.14 % increases in the stem and flange compared to 14.62 % and 0.23 % for Al. Higher relative humidity reduces temperature and efficiency through stronger condensation, while a larger length ratio lowers efficiency by extending the conduction path, with other parameters also analysed for their impact on fin performance. This study improves fin design for humid environments, benefiting heat exchangers and dehumidifiers.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109814"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262261","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 thermal performance and entropy management in a Y-shaped cavity with an inner rectangular Vertical Wall: A computational study with sensitivity analysis using response surface methodology","authors":"Bijan Krishna Saha ,&nbsp;Ashik Ahmed Shuvo ,&nbsp;Md. Shah Najmus Shakib ,&nbsp;Litan Kumar Saha ,&nbsp;Goutam Saha","doi":"10.1016/j.icheatmasstransfer.2025.109812","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109812","url":null,"abstract":"<div><div>Natural convection (NC) and heat transfer (HT) in complex geometries are critical for optimizing thermal systems, including electronic cooling and energy-efficient designs. Our research aims to analyze the effect of the Rayleigh number (<em>Ra</em>) under different rectangular vertical wall (RVW) thermal boundary conditions on HT efficiency and entropy generation (E_gen). The Finite Element Method is used to solve the governing equations. Key parameters include <em>Ra</em> = 10³ to 10⁶, Prandtl number (<em>Pr</em> = 7.0), and various RVW configurations. Results reveal that an increase in Ra enhances both the average Nusselt number (Nu_avg) and E_gen while reducing the Bejan number (Be), indicating intensified flow and higher viscous dissipation. At Ra = 10⁶, the heated RVW shows only a 4.61 % higher Nu_avg than the cold RVW, but results in 88.36 % higher E_gen and a 42.25 % lower Be, suggesting a dominance of viscous effects. Sensitivity analysis shows that <em>Ra</em> is the most influential factor on Nu_avg, while RVW height (h) has a moderate and width (w) a weak positive influence. This study provides critical insights into the design of thermally efficient systems, highlighting the significant roles of RVW thermal conditions and <em>Ra</em> in balancing HT performance and E_gen within a Y-shaped enclosure<em>.</em></div><div>To ensure the accuracy of our simulation, we conducted qualitative validation using other published studies and quantitative validation, achieving an error margin below 1 %.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109812"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262861","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":"Thermodynamic and thermal perspectives of failure in oscillating heat pipe","authors":"Ashok Thapa,&nbsp;Maheswar Chaudhary,&nbsp;Ryan Gallagher,&nbsp;Shalabh C. Maroo","doi":"10.1016/j.icheatmasstransfer.2025.109745","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109745","url":null,"abstract":"<div><div>Oscillating heat pipes (OHPs) have garnered significant attention for thermal management applications due to their high heat transfer efficiency, ease of miniaturization, and adaptable form factor. However, their operation can be prone to failure under unpredictable heat input conditions, potentially leading to device malfunction. The mechanisms driving such failures remain poorly understood, thereby complicating efforts to reliably predict OHP performance limits. In this study, the operational limit at which OHP failure occurs is experimentally identified, and two predictive criteria—thermal convergence and the thermodynamic saturation limit—are introduced to explain and predict the onset of such failure. A 14-tube OHP is fabricated, with the evaporator and condenser sections constructed from copper tubing, and the adiabatic section made of non-conductive, transparent glass tubing. Temperature and pressure measurements are obtained from a selected tube for three working fluids: water, methanol, and ethanol. OHP failure is directly observed during experiments conducted with water as the working fluid. The predictive capability of the two criteria is validated using the experimental results for water, and subsequently applied to methanol and ethanol, enabling failure prediction without operating the OHP to the point of failure.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109745"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262860","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":"Transient heat transfer characteristics and flow mechanism of two-phase closed thermosyphon","authors":"Wandong Bai ,&nbsp;Zhanli Geng ,&nbsp;Xiang Li ,&nbsp;Lanxin Wang ,&nbsp;Yue Shen ,&nbsp;Wei Chen","doi":"10.1016/j.icheatmasstransfer.2025.109753","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109753","url":null,"abstract":"<div><div>The two-phase closed thermosyphon (TPCT) has shown great potential in solar thermal collectors. Despite the prevalence of internal-external conjugate heat transfer in practical TPCT applications, research on this topic remains limited. This study investigates the effects of three typical condensation cooling scenarios, heating power, and working fluid filling ratio on TPCT heat transfer characteristics. In order to reveal the underlying mechanisms, a phase change model for TPCT simulation was developed based on Lee's equation using the Nusselt's theory and the principle of thermal balance. The results indicated that the two-phase flow within the TPCT exhibits intermittent boiling, continuous boiling, and annular flow modes under the varying operational conditions. These two-phase flow patterns in turn determine the temperature behavior and overall heat transfer performance of the TPCT. This work contributes to a deeper understanding of the mechanisms governing TPCT heat transfer, thereby providing guidance for controlling operational condition in its application.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109753"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262755","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":"Increasing the thermal performance of double-pipe heat exchangers by active methods: A comprehensive review","authors":"Saif Ali Kadhim ,&nbsp;Rassol Hamed Rasheed ,&nbsp;Osama Abd Al-Munaf Ibrahim ,&nbsp;Husam Abdulrasool Hasan ,&nbsp;Farhan Lafta Rashid ,&nbsp;Ali M. Ashour ,&nbsp;Abdallah Bouabidi ,&nbsp;Karrar A. Hammoodi","doi":"10.1016/j.icheatmasstransfer.2025.109837","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109837","url":null,"abstract":"<div><div>This review investigates recent advancements in active heat transfer enhancement techniques for double-pipe heat exchangers, which are widely used in industrial and energy systems due to their simple design, ease of maintenance, and operational flexibility. A typical double-pipe heat exchanger consists of one pipe inside another, enabling efficient heat exchange between two fluids. While passive methods for improving thermal performance in double-pipe heat exchangers offer limited enhancement, active techniques, such as mechanical vibration, tube rotation, fluid injection, electromagnetic fields, and acoustic excitation, have demonstrated greater effectiveness by disturbing the thermal boundary layer and inducing enhanced turbulence, leading to significantly improved heat transfer rates. This review classifies active techniques into mechanical, electromagnetic, acoustic, and thermal categories, providing detailed insights into their mechanisms, working fluids, flow regimes, and combined applications with passive elements. Experimental and numerical studies are compared based on the thermal enhancement factor, revealing that electromagnetic techniques, particularly magnetic turbulators, achieved the highest thermal enhancement factor values (above 4), especially in laminar flows. Mechanical vibration and tube rotation also demonstrated strong enhancement, with promising results when integrated with nanofluids or twisted tapes. Despite trade-offs in pressure drop and energy input, active methods show high potential for targeted heat transfer improvement in double-pipe heat exchangers, especially under controlled flow conditions. The findings serve as a benchmark for selecting optimal enhancement strategies in advanced thermal systems.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109837"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262260","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":"Pulsatile hemodynamic prediction in cerebral fusiform aneurysms using proper orthogonal decomposition model and long short-term memory networks","authors":"Walid Aich ,&nbsp;Joy Djuansjah ,&nbsp;Ali B.M. Ali ,&nbsp;As'ad Alizadeh ,&nbsp;Muntadher Abed Hussein ,&nbsp;Narinderjit Singh Sawaran Singh ,&nbsp;Khalil Hajlaoui ,&nbsp;Wajdi Rajhi","doi":"10.1016/j.icheatmasstransfer.2025.109833","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109833","url":null,"abstract":"<div><div>This study presents a hybrid computational framework that combines Proper Orthogonal Decomposition (POD) with Long Short-Term Memory (LSTM) neural networks to efficiently model and forecast transient hemodynamic parameters in patient-specific cerebral fusiform aneurysm geometries. High-resolution computational fluid dynamics (CFD) simulations were performed using ANSYS-Fluent with a Casson non-Newtonian blood model, resolving flow fields including wall shear stress (WSS), oscillatory shear index (OSI), and pressure under both rest and exercise physiological conditions. POD was applied to extract dominant spatial modes, achieving over 99 % energy capture within 50 modes, thereby enabling significant model reduction. Quantitative analysis based on L2 norm differences showed low reconstruction and prediction errors, particularly for pressure and WSS components, while OSI exhibited higher variability due to its sensitivity to temporal fluctuations. Contour plots of predicted fields confirmed that the proposed model preserves critical spatial features, including high-shear and oscillatory regions relevant to aneurysmal wall degradation. The proposed POD-LSTM surrogate model offers a fast, accurate, and computationally efficient alternative to full CFD simulations, making it suitable for real-time hemodynamic analysis and patient-specific aneurysm assessment. This work lays the foundation for future integration of reduced-order Artificial Intelligence (AI) models into clinical workflows, supporting predictive diagnostics and personalized neurovascular care.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109833"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262867","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 heat transfer enhancement performance of a jet impingement heat sink combining with inverted trapezoidal mini-channel","authors":"Ming Peng,&nbsp;Kai Zheng,&nbsp;Ke Yang,&nbsp;Yuyang Li,&nbsp;Yecheng Liu,&nbsp;Hong Ji,&nbsp;Zhixiang Xing","doi":"10.1016/j.icheatmasstransfer.2025.109831","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109831","url":null,"abstract":"<div><div>The pursuit of high heat flux dissipation in power electronics demands cooling solutions that transcend the performance of conventional mini-channels. This numerical study employs the <em>k</em>-<em>ε</em> turbulence model to optimize a hybrid jet impingement and mini-channel system by evaluating the cross-section shape, inclination angle, and jet number. Key findings reveal that the inverted trapezoidal channel minimizes flow resistance, reducing pressure drop by approximately 57 % compared to the straight channel. While the pressure drop of trapezoidal mini-channel is the highest, about three times that of straight channels. Field synergy analysis shows that the diverging mini-channel enhance heat transfer best. However, the inverted trapezoidal channel offers the best thermal-hydraulic performance, lowering the thermal resistance by up to 22.5 % compared with straight channel at a pressure drop of 19.5 kPa. Parametric analysis of the bottom width identifies an optimum of 0.16 mm, maintaining the peak thermal resistance below 0.48 cm²·°C/W with a lower pressure drop. Furthermore, increasing jet inlets degrades thermal resistance despite reducing the pressure drop. Single-inlet designs minimize thermal resistance via higher jet intensity. Whereas the channel with 3 inlets enhances bottom-wall temperature uniformity by 4.2 % under the mass flow rate studied.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109831"},"PeriodicalIF":6.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262256","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}