International Journal of Thermal Sciences最新文献_第8页

Drilled steel assessment using vegetable-based nanofluids: Thermal infrared response evolution 用植物基纳米流体评价钻孔钢：热红外响应演化

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2025-12-19 DOI: 10.1016/j.ijthermalsci.2025.110525

J.J. Jiménez-Galea , A.I. Gómez-Merino

{"title":"Drilled steel assessment using vegetable-based nanofluids: Thermal infrared response evolution","authors":"J.J. Jiménez-Galea , A.I. Gómez-Merino","doi":"10.1016/j.ijthermalsci.2025.110525","DOIUrl":"10.1016/j.ijthermalsci.2025.110525","url":null,"abstract":"<div><div>In machining processes such as drilling, effective thermal management is crucial for maintaining tool life, dimensional precision, and energy efficiency. Thermal diffusivity reveals how quickly the heat generated by the drill bit is transferred between the steel and the nanofluid film. Thermal properties are often influenced by the internal microstructure of the materials. In this work, a non-destructive method for estimating the thermal diffusivity of composite materials during drilling operations was proposed. The system comprised a steel plate with a cutting fluid layer on top. This approach entailed the integration of infrared thermography (IRT) with a mathematical model predicated on the logarithm of the temperature profile. The performance of dry drilling was then compared with that of two silica fumed/coconut oil-based nanofluids and the mineral Sinorcut cutting oil (SCO). To elucidate the findings of the thermal diffusivity experiments in relation to the microstructure of the nanofluids, an evaluation of the flow behavior of these two nanofluids was conducted. In view of the gel-like consistency exhibited by the two colloids, the influence of shear rate and temperature in steady state and oscillatory shear was evaluated. Furthermore, the thermal diffusivities and effusivities of the composite materials were estimated by using a bilayer composite model, incorporating the experimental values of thermal conductivity and specific heat capacity for each component. These results were consistent with the previously estimated experimental values derived from IRT.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110525"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Establishment of thermo-elastic-fluid coupling model of with considering structural thermal expansion and lubricating performances study of air foil thrust bearing 建立了考虑结构热膨胀的空气箔型推力轴承热弹流耦合模型及润滑性能研究

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2026-01-05 DOI: 10.1016/j.ijthermalsci.2025.110633

Shuang-min Li, Yang Wu, Cong-peng Shao, Qi An

{"title":"Establishment of thermo-elastic-fluid coupling model of with considering structural thermal expansion and lubricating performances study of air foil thrust bearing","authors":"Shuang-min Li, Yang Wu, Cong-peng Shao, Qi An","doi":"10.1016/j.ijthermalsci.2025.110633","DOIUrl":"10.1016/j.ijthermalsci.2025.110633","url":null,"abstract":"<div><div>This paper investigates air foil thrust bearings of circumferentially distributed bumps, employing non-isothermal Reynolds equation and 3D energy equation to describe the pressure distribution, thickness distribution, and temperature distribution of the air film, respectively. A 3D thermo-elastic-fluid coupling model of AFTBs is established using elasticity theory and the finite element method. This model comprehensively accounts for thermal expansion of the foil structures and thrust disc, centrifugal deformation of the rotor-thrust disc, heat transfer between bearing structures, and thermal resistance of the air gap in the contact areas. The reliability of the theoretical model is verified by comparing numerical results with experimental results. Furthermore, the results predicted in this paper are consistent with those obtained from existing THD models in the literature. The results indicate that the TEHD model is more precise than THD model when the initial clearance decreases and rotational speed increases. On this basis, a specific example is studied and obtains the air film pressure, air film thickness, air film temperature distributions, and deformation and temperature distribution of structures considering structural thermal expansion. The two TEHD models that considers structural thermal expansion and ignores structural thermal expansion are compared by analyzing the effects of rotational speed and load on the lubricating performances of the bearing. Finally, the influences of foils structural parameters on the load capacity and the maximum temperature of all structures are also investigated to provide practical engineering reference value for bearing design.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110633"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oscillation characteristics of cooling system with macro- and microchannel evaporators 大、微通道蒸发器冷却系统振荡特性研究

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2026-01-05 DOI: 10.1016/j.ijthermalsci.2026.110662

Qi Jin , Fang Wang , Jia-yi Zheng , Si-yu Liu

{"title":"Oscillation characteristics of cooling system with macro- and microchannel evaporators","authors":"Qi Jin , Fang Wang , Jia-yi Zheng , Si-yu Liu","doi":"10.1016/j.ijthermalsci.2026.110662","DOIUrl":"10.1016/j.ijthermalsci.2026.110662","url":null,"abstract":"<div><div>This study investigated the dynamics of a pumped liquid cycle system, highlighting the impact of integrating a microchannel evaporator alongside macro-channel components. Without a microchannel evaporator in the system, the pressure drop in the macro-channel evaporator exhibit some variation but remain relatively stable. However, the integration of microchannels induces periodic oscillations in mass flow rate and pressure drops even without active heating. Detailed investigations under various operating conditions reveal the oscillation characteristics. Decreasing pump speed results in reduced amplitude of mass flow rate oscillations, while their frequency increases, indicating more rapid variations. For instance, when <span><math><mrow><msub><mi>Q</mi><mtext>macro</mtext></msub></mrow></math></span> = 150 W, <span><math><mrow><msub><mi>Q</mi><mtext>micro</mtext></msub></mrow></math></span> = 0 W, as the speed decreases from 450 rpm to 250 rpm, the oscillation amplitude of wall temperature decreases from 1.51 °C to 1.39 °C and the frequency increases from 0.33 Hz to 0.44 Hz. The frequency of macro-channel pressure drop oscillations increases at lower pump speeds. Similar trends are observed in microchannel pressure drop oscillations, with amplitude tending to decrease as pump speed decreases and higher pump speeds resulting in larger amplitudes. This study highlights the system's sensitivity to the existence of the microchannel evaporator. These findings provide valuable insights for the optimization and control of pumped liquid cycle, contributing to enhanced performance and efficiency.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110662"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Staggered counterflow rectangular microchannel liquid-cooled plate based on nanofluids for enhanced heat transfer performance 基于纳米流体的交错逆流矩形微通道液冷板增强传热性能

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2025-12-29 DOI: 10.1016/j.ijthermalsci.2025.110651

Zhengchao Yang , Yu Wang , Xiaolei Yuan , Xiaotong Ding , Guang Yang , Xuejing Yang , Qipeng Li

{"title":"Staggered counterflow rectangular microchannel liquid-cooled plate based on nanofluids for enhanced heat transfer performance","authors":"Zhengchao Yang , Yu Wang , Xiaolei Yuan , Xiaotong Ding , Guang Yang , Xuejing Yang , Qipeng Li","doi":"10.1016/j.ijthermalsci.2025.110651","DOIUrl":"10.1016/j.ijthermalsci.2025.110651","url":null,"abstract":"<div><div>This work innovatively proposes the integration of TiO<sub>2</sub>/H<sub>2</sub>O nanofluids with a staggered counter-flow rectangular microchannel liquid-cooled plate, establishing a synergistic cooling mechanism that enhances heat transfer efficiency while minimizing flow resistance. Numerical simulations and experiments were conducted to systematically evaluate the effects of nanoparticle type, volume concentration (1–5 vol%), inlet flow velocity (0.3–0.7 m/s), and initial temperature (31–39 °C) on the thermo-hydraulic performance of the cooling plate. Results indicate that among the nanofluids tested, TiO<sub>2</sub> achieved the most significant heat transfer enhancement, with its Nusselt number (<em>Nu</em>) increasing by 16.6 % compared to pure water at 5 vol%. Although higher nanoparticle concentrations notably increased flow resistance, raising the inlet velocity improved heat transfer (up to 76.6 % <em>Nu</em> increase) at the expense of a higher-pressure drop. Using the Box-Behnken response surface methodology (RSM), optimal operating conditions (1 vol%, 0.511 m/s, 34.6 °C) were identified, yielding a 31.98 % increase in <em>Nu</em> under low flow resistance constraints. Experimental validation showed that at 0.6 m/s and 1 vol% TiO<sub>2</sub>/H<sub>2</sub>O nanofluid, the contact surface temperature was reduced by 4.89 % compared to pure water, with a maximum <em>Nu</em> improvement of 32.86 %. Furthermore, a new <em>Nu</em> correlation was proposed and validated against experimental data, model predictions, and results from published literature. These findings provide a practical and efficient cooling solution for high-power electronic devices with stringent thermal management requirements, offering valuable insights for both academic research and engineering applications.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110651"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-layer metamaterial solar absorber based on tungsten metal for broadband high absorption and high-temperature thermal radiation stability 基于钨金属的三层超材料太阳能吸收体，具有宽带高吸收和高温热辐射稳定性

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2026-01-01 DOI: 10.1016/j.ijthermalsci.2025.110648

Zhuocheng Xue , Shubo Cheng , Huafeng Zhang , Jun Zhu , Zao Yi

{"title":"Three-layer metamaterial solar absorber based on tungsten metal for broadband high absorption and high-temperature thermal radiation stability","authors":"Zhuocheng Xue , Shubo Cheng , Huafeng Zhang , Jun Zhu , Zao Yi","doi":"10.1016/j.ijthermalsci.2025.110648","DOIUrl":"10.1016/j.ijthermalsci.2025.110648","url":null,"abstract":"<div><div>This study presents a novel three-layer metamaterial solar absorber design. The objective of this design is to overcome the technological limitations that currently exist and to encourage the practical application of photothermal conversion technology. The design utilizes titanium (Ti) cubes as the bottom substrate, leveraging its high hardness and corrosion resistance to provide structural support and long-term stability; the middle layer employs silicon dioxide (SiO<sub>2</sub>) cubes, which augment multiple reflections and trapping of light within the structure by virtue of their low refractive indices and excellent thermal insulating properties. The uppermost layer is constituted by a hollow, symmetrical, pentagonal tungsten (W) structure. This structure, in conjunction with tungsten's elevated melting point and plasma resonance characteristics, facilitates high-efficiency absorption within the 200–2300 nm band. The hollow design reduces the amount of material used, thereby optimizing the cost. This study used finite difference method (FDTD) simulations to verify that the absorber exhibits an absorption rate exceeding 90 % in the 200–2300 nm wavelength range and maintains superior performance under various climatic conditions with incident angles from 0° to 60° and TM/TE polarization. Furthermore, its thermal properties were evaluated through simulations (573–1073 K), and cost-effective preparation methods were explored to promote its industrial application. This study offers novel concepts for the development of highly efficient, stable, and economically viable solar absorbers, thereby facilitating the large-scale promotion and industrialization of solar thermal technology.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110648"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulating the full-scale compartment fire dynamics influenced by the initial single-glazing window and door opening conditions 模拟初始单玻璃窗和单门开启条件对全尺寸舱室火灾动力学的影响

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2025-12-29 DOI: 10.1016/j.ijthermalsci.2025.110624

Ting Xia , Yu Wang

{"title":"Simulating the full-scale compartment fire dynamics influenced by the initial single-glazing window and door opening conditions","authors":"Ting Xia , Yu Wang","doi":"10.1016/j.ijthermalsci.2025.110624","DOIUrl":"10.1016/j.ijthermalsci.2025.110624","url":null,"abstract":"<div><div>In real building fires, ventilation may dramatically change due to the glass fallout and door opening. However, little is known about the interaction between the sudden ventilation change and compartment fire dynamics, especially the capacity of Computational Fluid Dynamics (CFD) tools to simulate this situation is still unknown. In this work, numerical simulations were conducted using Fire Dynamics Simulator (FDS) for two different opening conditions, namely door and window remained open, and door and window initially closed and changed gradually. The combustibles/furniture burnt in the experiments were tested for Thermogravimetric Analysis (TGA) and Differential Scanning Calorimeter analysis (DSC), to obtain pyrolysis and combustion characteristics for the Complex Pyrolysis Models of furniture used in simulation. The primary simulated fire dynamics were then captured and compared with the full-scale experimental results and estimated values based on experiments. It was established that FDS performed well in well-ventilated fires, but simulating fires with smoldering combustion and sudden ventilation changes in a compartment was challenging, resulting in faster fire development and spread with higher heat release rate than experimental results. Based on the numerical model validated by upper gas temperatures of Tests 1 and 2, the changes in temperature distribution, flow velocity and gas concentration for different fire stages and opening conditions were calculated and demonstrated. It was found that the sudden ventilation change, by glass fallout and door opening exacerbated combustion significantly and caused the recirculation zone to move towards the new opening, disrupting the stable recirculation zone. The results deepen the understanding of the compartment fire behaviour and flow field after sudden ventilation changes, and quantify the potential of CFD and real fire conditions with boundary conditions change resulting from window and doors.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110624"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-performance and high-reliability Ga2O3 Schottky barrier diodes enabled by double-side packaging integrated with microchannel cooling 高性能和高可靠性的Ga2O3肖特基势垒二极管通过集成微通道冷却的双面封装实现

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2025-12-23 DOI: 10.1016/j.ijthermalsci.2025.110626

Jiajun Zhou , Xin Feng , Weihang Zhang , Pengfei Dong , Xianhe Liu , Zhihong Liu , Hong Zhou , Yue Hao , Jincheng Zhang

{"title":"High-performance and high-reliability Ga2O3 Schottky barrier diodes enabled by double-side packaging integrated with microchannel cooling","authors":"Jiajun Zhou , Xin Feng , Weihang Zhang , Pengfei Dong , Xianhe Liu , Zhihong Liu , Hong Zhou , Yue Hao , Jincheng Zhang","doi":"10.1016/j.ijthermalsci.2025.110626","DOIUrl":"10.1016/j.ijthermalsci.2025.110626","url":null,"abstract":"<div><div>Ultra-wide bandgap (UWBG) semiconductor Ga<sub>2</sub>O<sub>3</sub> Schottky barrier diodes (SBDs) have emerged as a leading candidate for next-generation power electronics owing to its low on resistance, ultrahigh critical breakdown electric field and superior Baliga's figure of merit (BFOM). However, it suffers from severe self-heating due to ultralow thermal conductivity, which limits power density and reliability. Hence, an active thermal management strategy is proposed by integrating double-side packaging with microchannel cooling. Experimental results demonstrate a 66.6 % reduction in junction-to-ambient thermal resistance (R<sub>j-a</sub>) from 39.8 K/W to 13.3 K/W and a maximum junction temperature drop of 58 %, achieving a low temperature of 88.6 °C at 4.5 W power dissipation. Electrically, the device exhibits a higher operating current of 1025.4 mA with 19.8 % enhancement at 3 V and a lower specific on-resistance (R<sub>on</sub>) of 3.50 mΩ cm<sup>2</sup> with at least 12.1 % decrease, in comparison with the conventional bottom-side packaged SBD under natural convection cooling. Under prolonged on-state electrical stress testing at 2 V bias, the current exhibited merely 7.3 % degradation over 6000 s. The synergy of the proposed double-side packaging and optimized microchannel cooling shortens thermal pathway and suppresses hotspot formation, providing a critical solution for high-power-density electronics.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110626"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rib-embedded design in microchannels heat sink to enhance thermal-hydraulic performance 肋嵌入设计的微通道散热器，以提高热工性能

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2025-12-20 DOI: 10.1016/j.ijthermalsci.2025.110607

Bin Li , Xujie Ma , Guidan Li , Yuqi Cui

{"title":"Rib-embedded design in microchannels heat sink to enhance thermal-hydraulic performance","authors":"Bin Li , Xujie Ma , Guidan Li , Yuqi Cui","doi":"10.1016/j.ijthermalsci.2025.110607","DOIUrl":"10.1016/j.ijthermalsci.2025.110607","url":null,"abstract":"<div><div>Uneven cooling and excessive pressure penalties remain critical limitations of conventional rib or rib–groove structures in microchannel heat sinks. This study aims to enhance the thermo-hydraulic performance by introducing a series of embedded cruciform ribs and the systematic morphological evolution of embedded quatrefoil ribs. Firstly, the simple cruciform rib and the regular quatrefoil rib are illustrated. Subsequently, the structures are extended to an irregular quatrefoil, an inverted quatrefoil, and an elongated quatrefoil rib. Based on the five aforementioned structures, the influence of different rib shapes on flow, heat transfer, and pressure drop characteristics within microchannels has been systematically analyzed using numerical simulations and parametric studies of rib geometry. The analysis reveals a coupled “throttling–entrainment–reattachment” mechanism by which the rib–groove interaction intensifies wall-layer scouring, sustains beneficial recirculation, and improves cold-fluid entrainment. Compared with conventional rib–groove configurations, the proposed evolutionary framework achieves a more favorable balance between heat-transfer enhancement and hydraulic penalty. Average heat-source temperature is reduced by 47.5 % and the performance-evaluation criterion (PEC) increases by 17.7 % relative to a straight rectangular channel under comparable pumping power.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110607"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bubble growth dynamics on different fin structures during nucleate boiling 不同翅片结构在成核沸腾过程中的气泡生长动力学

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2025-12-20 DOI: 10.1016/j.ijthermalsci.2025.110614

Adib Mahmoodi Nasrabadi , Abhishek Ratanpara , Abhishek , Philippe Mandin , Rosalinda Inguanta , Myeongsub (Mike) Kim

{"title":"Bubble growth dynamics on different fin structures during nucleate boiling","authors":"Adib Mahmoodi Nasrabadi , Abhishek Ratanpara , Abhishek , Philippe Mandin , Rosalinda Inguanta , Myeongsub (Mike) Kim","doi":"10.1016/j.ijthermalsci.2025.110614","DOIUrl":"10.1016/j.ijthermalsci.2025.110614","url":null,"abstract":"<div><div>Enhancing the magnitude of heat transfer is critical for improving thermal management in high-performance applications. This study experimentally investigates the effects of different fin structures—simple, coated, dimpled, and holed—on boiling heat transfer performance under varying subcooling conditions. Boiling curves indicate that fins with artificial nucleation sites significantly enhance heat transfer, reducing wall temperatures at the same heat flux. The fin with a hole exhibits the best performance, shifting the boiling curve to lower temperatures by approximately 5 °C. Bubble departure frequency increases with wall temperature, with the holed fin showing the highest departure rate due to its increased surface area and nucleation sites. Bubble growth rate analysis reveals rapid initial growth followed by a slower mass transfer-driven phase, with the holed fin facilitating the fastest growth. Bubble departure diameter increases with wall temperature and decreases with subcooling, with the holed fin producing the largest bubbles. Contact angle measurements show that wettability improves as liquid temperature increases, reducing surface tension and facilitating vapor removal. Overall, the holed fin demonstrates the most effective boiling characteristics, making it an optimal design for enhanced heat transfer applications. These findings provide valuable insights into surface engineering strategies for improving boiling efficiency in industrial and engineering applications.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110614"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-efficiency heat sink design via SLM-processed diamond TPMS CuCrZr alloy: Optimizing thermal-fluid performance through volume fraction control 采用slm加工的金刚石TPMS CuCrZr合金设计高效散热器：通过体积分数控制优化热流体性能

IF 5 2区工程技术

International Journal of Thermal Sciences Pub Date : 2026-05-01 Epub Date: 2026-01-05 DOI: 10.1016/j.ijthermalsci.2026.110657

Yaoxian Zhang , Yaqin Yang , Xueli Chen , Bin Liu , Xiaoqing Yang , Yuan Gao , Zhuoran Zhang , Delin Kong , Donghua Lei , Zezhou Kuai , Zhonghua Li , Rui Wang

{"title":"High-efficiency heat sink design via SLM-processed diamond TPMS CuCrZr alloy: Optimizing thermal-fluid performance through volume fraction control","authors":"Yaoxian Zhang , Yaqin Yang , Xueli Chen , Bin Liu , Xiaoqing Yang , Yuan Gao , Zhuoran Zhang , Delin Kong , Donghua Lei , Zezhou Kuai , Zhonghua Li , Rui Wang","doi":"10.1016/j.ijthermalsci.2026.110657","DOIUrl":"10.1016/j.ijthermalsci.2026.110657","url":null,"abstract":"<div><div>The thermal management of next-generation electronic and aerospace devices demands advanced heat dissipation solutions. While fin-type heat sinks enhance thermal conduction through extended surface areas, their performance is becoming inadequate for modern applications. Triply Periodic Minimal Surface (TPMS) structures, particularly the Diamond topology, offer superior heat transfer capabilities due to their high specific surface area and permeability. However, existing studies predominantly focus on aluminum alloys or titanium alloys, with limited research on copper-based TPMS structures. Here, we investigate Selective Laser Melting (SLM)-fabricated CuCrZr Diamond structures, a promising material for aerospace thermal management due to its exceptional thermal/mechanical properties. Through numerical simulations and experimental validation, we analyze the effects of pore size and convective area on thermal performance, benchmarking against conventional fin structures. Results demonstrate that increasing relative density enhances convective heat transfer but elevates pressure drop. At 0.4 m/s inflow velocity, the 50 %-porosity Diamond-Sheet variant achieves a peak average convection coefficient of 112,714.4 W/(m<sup>2</sup>·K) – 176 % and 209 % higher than Fin and Diamond-Solid structures, respectively, with a performance evaluation criterion (PEC) of 1.55.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"223 ","pages":"Article 110657"},"PeriodicalIF":5.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0