International Communications in Heat and Mass Transfer最新文献

{"title":"BTMS thermal properties and optimisation of new bionic petal-shaped fin-reinforced phase change materials","authors":"Xuan Wenping,&nbsp;Zhang Furen,&nbsp;Luo Xin,&nbsp;Hu Sunran","doi":"10.1016/j.icheatmasstransfer.2025.109617","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109617","url":null,"abstract":"<div><div>In order to achieve lightweight design of metal fins and enhance the heat transfer performance between phase change materials (PCM) and lithium batteries, the coordinated design of fins and phase change materials (BTMS) is particularly critical. Based on biomimetic design, this paper proposed a novel branch fin design featuring three types of biomimetic petal structures. Initially, the thermal performance of the three new fins was evaluated under a 5C discharge rate to identify the most efficient design. Next, the impact of the coverage area of the inner arc fins on thermal performance was analyzed. The results indicated a significant variation in the battery's maximum temperature (<em>T</em>_<em>max</em>) with changes in the inner arc angle. When the inner arc angle was 40°, <em>T</em>_<em>max</em> of the battery decreased by 4.46 K compared to the original fin design. In order to further improve the battery heat dissipation performance, meridian straight fins were added to the original fin design to increase the contact area with the phase change material (PCM), thereby enhancing the heat dissipation capability. Finally, multi-objective optimization was performed on the optimal design model. The optimized model achieved a 4.91 K reduction in <em>T</em>_<em>max</em> compared to the initial model, while the operating time at the same temperature was extended by 93.05 %.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109617"},"PeriodicalIF":6.4,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997064","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":"Thermal and reactive transport in nonlinear flow over a rotating disk with variable thermal conductivity: A statistical approach","authors":"Imad Khan ,&nbsp;M. Waleed Ahmed Khan ,&nbsp;Hala A. Hejazi ,&nbsp;Najla A. Mohammed ,&nbsp;F.F. Al-Harbi","doi":"10.1016/j.icheatmasstransfer.2025.109605","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109605","url":null,"abstract":"<div><div>The statistical analysis of the Eyring-Powell fluid dynamics on a rotating disk involving the fluid behavior with focus on thermal conductivity and slip effects is shown in the current article. Exploration of slip effect and homogeneous-heterogeneous reactions within the fluid, are aimed to comprehend the governing relationships of heat transfer and chemical reactions in this system. This approach provides valuable perceptions into the fundamental principles which govern fluid dynamics, also contributing to both theoretical knowledge and practical applications. The laminar flow induced by a rotating disk is governed by non-linear PDEs which are derived from the Navier–Stokes equations with the help of boundary layer approximations. By applying suitable transformations, these equations are reduced to a set of non-linear ordinary differential equations and then solved numerically using shooting technique. Quantities of engineering interests such as skin friction and heat transfer analysis are derived and graphically shown. Flow features i.e. velocity, temperature distribution and concentration profiles are exemplified quantitatively as well as graphically. A comparison between actual results and estimated results has been made for validation purposes. A good agreement between the two data has been shown graphically.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109605"},"PeriodicalIF":6.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989048","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 three-dimensional force balance model for predicting bubble departure in conventional circular tubes","authors":"Wen He,&nbsp;Jinyu Han,&nbsp;Chenru Zhao,&nbsp;Yanlin Li,&nbsp;Deyang Gao,&nbsp;Zhiyuan Sun,&nbsp;Hanliang Bo","doi":"10.1016/j.icheatmasstransfer.2025.109614","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109614","url":null,"abstract":"<div><div>Flow boiling in inclined channels involves complex bubble dynamics. The force balance model is a key approach for predicting the bubble departure diameter. Currently, existing models are developed for rectangular channels, where bubbles only exist two detachment modes: axial sliding and wall-normal lifting. However, variations in the bubble's circumferential position may lead to the appearance of a third detachment mode—circumferential sliding, which is often overlooked. To bridge this gap, a three-dimensional force balance model is proposed in this study to account for the influence of circumferential angle variations on bubble detachment behaviors. Firstly, the model resolves the forces acting on a bubble into axial, radial, and circumferential components. Then, mathematical expressions for each force are determined based on existing experimental data with a wide range of working applications. A bubble deviation angle is introduced and evaluated through sensitivity analysis. After the model is established, it is applied to predict bubble departure modes and sizes under various operating conditions, with a comprehensive analysis of the effects of operating parameters, channel inclination, and circumferential position on bubble detachment. This work extends conventional two-dimensional models into three dimensions, providing a foundational framework for future investigations of near-wall transport phenomena in circular channels.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109614"},"PeriodicalIF":6.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988947","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":"Micropolar nonlocal theory on reflection of plane waves in a higher-order thermo-diffusive semiconductor","authors":"Hashmat Ali ,&nbsp;Iftikhar Ahmed","doi":"10.1016/j.icheatmasstransfer.2025.109540","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109540","url":null,"abstract":"<div><div>This study explores how elastic waves reflect and propagate in a generalized thermo-diffusive, nonlocal micro-polar semiconducting elastic solid. Heat propagation is analysed using a three-phase lag model with higher-order fractional derivatives, while wave behaviour is examined through a non-local theory. The diffusion equation incorporates two phase delays. By applying the Helmholtz vector rule, the system is split into longitudinal and transverse components. The frequency dispersion relation reveals two sets of four coupled longitudinal waves and two sets of two transverse waves. The study plots wave speeds against angular frequency for both local and nonlocal media and provides a graphical representation of the cut-off frequency. To calculate reflection coefficients, the longitudinal P-wave functions at the solid's free surface are considered as incident waves. The study further investigates how nonlocal and fractional order parameters impact amplitude ratios, revealing significant effects on wave behaviour. These results underscore the importance of considering both nonlocal effects and fractional derivatives in the analysis of wave propagation in complex media. The research not only contributes to a deeper understanding of wave dynamics in nonlocal and micro-polar solids but also offers practical insights for applications in geophysics, material science, and engineering. The findings, validated within the framework of energy conservation, provide valuable guidance for scientists and researchers exploring advanced materials and wave phenomena.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109540"},"PeriodicalIF":6.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989042","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":"Scaling-lumped transient method and thermal response evaluation of plate-fin heat exchangers","authors":"Kaichun Yang ,&nbsp;Xingjuan Zhang ,&nbsp;Chunxin Yang ,&nbsp;Lina Zhang ,&nbsp;Han Yang","doi":"10.1016/j.icheatmasstransfer.2025.109622","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109622","url":null,"abstract":"<div><div>Compact heat exchangers play a significant role in the heat transfer process of aircraft cabin air cycle systems (ACSs), and their heat transfer performance significantly influences system refrigeration efficiency. During flight, the inlet conditions of heat exchangers exhibit significant transient characteristics, such as changes in air temperature and mass flow rate. Accurately characterizing the thermal response of heat exchangers is therefore essential for predicting outlet temperatures, as well as for optimizing ACS control strategies. This study proposes a scaling-lumped transient method (SLTM) for plate-fin heat exchangers by improving the scaling law model and time constant lumped model, enabling direct prediction of the transient outlet thermal response of heat exchangers under step or ramp transient input and variable heat exchanger structures. A transient performance testbed for heat exchangers was developed. Three types of transient input condition tests, including inlet flow rate step changes, inlet temperature ramp changes, and simultaneous changes, were conducted for three plate-fin heat exchangers with straight, corrugated, and serrated fins. The results showed that the average error between the experimental data and SLTM did not exceed 1 %, with a maximum error of 3.4 %. The scaling regression of all transient data further revealed the heat-transfer mechanism of the transient thermal response. This study provides an efficient and accurate transient performance prediction method, advancing the design and application of plate-fin heat exchangers.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109622"},"PeriodicalIF":6.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989044","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":"High-performance pyramid solar still with hemispherical fins and parabolic collector: A numerical investigation for sustainable water desalination","authors":"Angham Fadil Abed ,&nbsp;Ahmed Mohsin Alsayah ,&nbsp;Mohammed J. Alshukri ,&nbsp;Samer Ali ,&nbsp;Jalal Faraj ,&nbsp;Mahmoud Khaled","doi":"10.1016/j.icheatmasstransfer.2025.109621","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109621","url":null,"abstract":"<div><div>In dry and semi-arid areas, freshwater scarcity is a serious problem. By employing solar energy to transform brackish water into drinkable water, solar stills provide a sustainable alternative. However, low productivity and efficiency are common problems with traditional solar stills. The goal of this project is to create and statistically assess improved passive and active pyramid solar still designs in order to greatly increase water yield and energy efficiency in comparison to conventional setups. A new method that combines passive and active pyramid solar stills with a hemispherically finned absorber is suggested. The active arrangement offers enhanced thermal performance and longer operating capabilities by utilizing nanofluid to integrate a heat exchanger with a parabolic trough collector (PTC). The governing conservation equations of heat and mass transmission for three configurations—traditional, passive-enhanced, and active-enhanced pyramid solar stills—were solved numerically using COMSOL Multiphysics. Thermal performance, energy efficiency, and water productivity were the main topics of the comparative study. The accumulated freshwater production of the passive and active systems was significantly higher than that of the conventional still, increasing by 116.23 % and 510.25 %, respectively. The highest hourly average thermal and exergy efficiencies were 24.75 % &amp; 1.44 % (traditional), 82.2 % &amp; 8.79 % (active), and 40.79 % &amp; 2.82 % (passive). The results validate that the suggested solutions are appropriate for both domestic and commercial settings, including greenhouse irrigation and hospitals in water-stressed areas.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109621"},"PeriodicalIF":6.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989043","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":"AI-optimized thermodynamic boundary layer analysis of nanofluid coatings for hypersonic space plasma sheath mitigation","authors":"Umar Farooq ,&nbsp;Chao Shen ,&nbsp;M. Mahtab Alam","doi":"10.1016/j.icheatmasstransfer.2025.109626","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109626","url":null,"abstract":"<div><div>Hypersonic vehicles face significant challenges due to space plasma sheath effects, which cause communication blackout and thermal stresses on curved surfaces. This study addresses these issues by developing a computational model to optimize the thermodynamic and electromagnetic performance of a hybrid nanofluid coating, composed of graphene oxide, titanium dioxide, and 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM][BF₄], on curved surfaces of hypersonic vehicles to mitigate space plasma sheath effects. The main goal is to enhance heat transfer and reduce electromagnetic wave. The novelty lies in coupling the Reiner-Philippoff hybrid nanofluid model with an artificial neural network using Levenberg–Marquardt backpropagation to analyze surface-plasma interactions. Governing equations in cylindrical coordinates model the flow, capturing mass, momentum, and energy transfer with viscous heating and radiative effects. These equations, solved numerically, describe the coating's interaction with the plasma sheath under magnetic fields and shear stress. The neural network analyses four scenarios and nine cases, using 300 grid points for velocity and temperature profiles and 120 for heat transfer rate analysis, with a dataset split of 80 % training, 10 % testing, and 10 % validation. Results show that increasing the curvature parameter (<span><math><mi>Λ</mi></math></span> = 2, 4, 6) raises the skin friction coefficient by 3.14 % to 15.92 %, while adjusting the radiation parameter (<span><math><msub><mi>R</mi><mi>d</mi></msub></math></span> = 0.5, 1, 1.5) enhances the Nusselt number by 25.23 % to 26.78 %. The hybrid nanofluid outperforms mono-nanofluid in velocity, and temperature at nanoparticle volume fractions of 0.01 and 0.02. The neural network achieves a coefficient of determination of 1.00, with mean squared error values of <span><math><mn>2.0913</mn><msup><mi>e</mi><mrow><mo>−</mo><mn>10</mn></mrow></msup></math></span> for heat transfer and <span><math><mo>−</mo><mn>1.6</mn><msup><mi>e</mi><mrow><mo>−</mo><mn>6</mn></mrow></msup></math></span> for heat transfer rate. These findings demonstrate the coating's potential to improve thermodynamic efficiency and mitigate plasma sheath-induced debonding.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109626"},"PeriodicalIF":6.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989046","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":"Near field flow dynamics of coaxial jet impingement heat transfer","authors":"Sidhartha Sankar Samantaray,&nbsp;Venugopal Arumuru","doi":"10.1016/j.icheatmasstransfer.2025.109580","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109580","url":null,"abstract":"<div><div>The present study experimentally investigates the heat transfer characteristics of coaxial jets (CJs) and their associated flow dynamics operated at various velocity ratios (<span><math><msub><mi>r</mi><mi>u</mi></msub></math></span> = 0.5 to 2) within jet exit to heated plate distances, <span><math><mi>z</mi><mo>/</mo><msub><mi>d</mi><mi>o</mi></msub><mo>=</mo><mn>0.57</mn><mspace></mspace></math></span>to <span><math><mn>5.71</mn></math></span>. Jet impingement experiments were performed using a thin foil technique to evaluate CJ's performance at different jet-to-heated plate distances (<span><math><mi>z</mi><mo>/</mo><msub><mi>d</mi><mi>o</mi></msub></math></span>). To investigate the underlying flow phenomena influencing heat transfer, hot-wire anemometry was employed for flow characterization. Flow visualization was done using a high-power laser and high-speed camera, capturing instantaneous images of the seeded flow. Heat transfer experiments were conducted with the inner jet operating at a Reynolds number of <span><math><mi>Re</mi><mo>=</mo><mn>9500</mn></math></span>, with only the annular jet velocity adjusted to achieve the desired velocity ratios. Based on the variation of stagnation point Nusselt number (<span><math><msub><mi>Nu</mi><mi>st</mi></msub></math></span>), three distinct regimes of velocity ratios (<span><math><msub><mi>r</mi><mi>u</mi></msub><mo>=</mo><mn>0.5</mn><mo>;</mo><mn>0.75</mn><mo>≤</mo><msub><mi>r</mi><mi>u</mi></msub><mo>≤</mo><mn>1.25</mn><mo>;</mo><msub><mi>r</mi><mi>u</mi></msub></math></span> ≥ 1.5) were reported. Each regime has distinct flow dynamics as a result of the nature of inner and outer shear layer vortices which manifests into a range of heat transfer values. It was observed that stagnation point Nusselt number <span><math><msub><mi>Nu</mi><mi>st</mi></msub></math></span> for <span><math><msub><mi>r</mi><mi>u</mi></msub></math></span> = 1.5, 1.75 and 2 attain a secondary peak near <span><math><mi>z</mi><mo>/</mo><msub><mi>d</mi><mi>o</mi></msub><mo>=</mo><mn>2.85</mn></math></span>. However, the area-averaged Nusselt number (<span><math><msub><mi>Nu</mi><mi>avg</mi></msub></math></span>) for <span><math><msub><mi>r</mi><mi>u</mi></msub></math></span> = 1.5, 1.75 and 2 reaches its secondary peak at <span><math><mi>z</mi><mo>/</mo><msub><mi>d</mi><mi>o</mi></msub><mo>=</mo><mn>2</mn></math></span>. Despite having higher overall momentum, coaxial jets with <span><math><msub><mi>r</mi><mi>u</mi></msub></math></span> = 0.75, 1 and 1.25 have lower average Nusselt number compared to <span><math><msub><mi>r</mi><mi>u</mi></msub></math></span> = 0.5.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109580"},"PeriodicalIF":6.4,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988934","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":"Characterization of mass burning rate and flame structure in mixed-convective wind-driven flames under the influence of freestream turbulence","authors":"Alankrit Srivastava,&nbsp;B.V. Sandeep,&nbsp;Ajay V. Singh","doi":"10.1016/j.icheatmasstransfer.2025.109591","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109591","url":null,"abstract":"<div><div>This study investigates the evolution of mass burning rate and flame structure in boundary-layer flames, with freestream velocity (<span><math><mi>U</mi></math></span>) and turbulence intensity (<span><math><mi>TI</mi></math></span>) ranging from 1 to 2 m/s and 1.8 % to 16 %, respectively. A liquid fuel-soaked wick was used as a fire source, with ethanol and n-heptane as fuels. The mass burning rate increased with <span><math><mi>U</mi></math></span> and <span><math><mi>TI</mi></math></span>, with n-heptane exhibiting higher values. A mass burning rate correlation was proposed using a modified mixed-convection parameter (<span><math><mi>ξ</mi><mo>=</mo><mi>Gr</mi><mo>/</mo><msup><mi>ψ</mi><mi>n</mi></msup></math></span>) that captures the combined effects of momentum, buoyancy, flow turbulence, and fuel property. Freestream turbulence altered flame geometry, inducing wrinkles, fluctuations, fragmentation, and curling. Coherent structures were significantly disrupted with <span><math><mi>TI</mi></math></span>, suggesting an earlier onset of the turbulent state. Both flame length and attachment length decreased with <span><math><mi>TI</mi></math></span>, with n-heptane flames consistently larger than ethanol flames. At higher <span><math><mi>U</mi></math></span> and <span><math><mi>TI</mi></math></span>, flame length approached a limiting value. Flame tilt angle increased with <span><math><mi>TI</mi></math></span>, influenced by flame height and horizontal flame length variations across fuels and flow conditions. Empirical correlations for flame profile parameters were proposed using the Froude number, non-dimensional heat release rate, fuel-to-air density ratio, and <span><math><mi>TI</mi></math></span>. Puffing frequency increased with <span><math><mi>U</mi></math></span> and <span><math><mi>TI</mi></math></span>, and the corresponding Strouhal number (<span><math><mi>St</mi></math></span>) exhibited a power-law relationship with <span><math><mi>ξ</mi></math></span>.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109591"},"PeriodicalIF":6.4,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988933","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":"High-efficiency fabrication of high-performance Al wicks via hybrid laser-etching processing","authors":"Hang Yu ,&nbsp;Guisheng Zou ,&nbsp;Yuxi Wu ,&nbsp;Jinpeng Huo ,&nbsp;Chengjie Du ,&nbsp;A. Zhanwen ,&nbsp;Kuan Zhao ,&nbsp;Lei Liu","doi":"10.1016/j.icheatmasstransfer.2025.109620","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109620","url":null,"abstract":"<div><div>The Al-based vapor chamber provides a significant solution for lightweight heat dissipation fields such as aerospace and electronic devices. Ultrafast laser processing is a promising strategy for fabrication of wicks in vapor chambers thanks to its precision, flexibility, and material universality. However, current ultrafast laser processing suffers from low efficiency in large-area industrial manufacturing. To address this issue, we proposed a hybrid laser-alkali-acid processing method to efficiently fabricate shape-controllable microgrooves on Al alloy substrates. The ultrafast laser irradiation was applied to induce high-precision ablation, generating deep microcracks that serve as initiation sites for etching. Alkali etching was employed to effectively enlarge the microcracks into microgrooves. Subsequent acid treatment was employed to remove residual by-products and reduce microscale surface roughness. This process also formed sub-microscale textures that introduced micro/nano features, further enhancing surface wettability. Compared with single ultrafast laser processing, this approach shows a nearly 792 % enhancement in material removal efficiency, overcoming the application limitations of high-power ultrafast laser in large-area processing. The capillary performance parameter (<em>K</em>/<em>R</em>_eff) reached 3.85, increasing 229 % from the original laser-induced microcrack. This method provides a processing paradigm for Al vapor chambers, holding great potential for both design optimization and process simplification.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109620"},"PeriodicalIF":6.4,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989047","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}