International Journal of Thermal Sciences最新文献_第4页

Analysis on thermal performances in the evaporator with double-layered porous domain above flow channels in refrigeration system 制冷系统流道上方带有双层多孔畴的蒸发器热性能分析

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-11 DOI: 10.1016/j.ijthermalsci.2025.109927

Shengjie Zhou, Wei Chen, Deyuan Zhao, Chuntong Li, Xinyi Chen, Hang Shi

{"title":"Analysis on thermal performances in the evaporator with double-layered porous domain above flow channels in refrigeration system","authors":"Shengjie Zhou, Wei Chen, Deyuan Zhao, Chuntong Li, Xinyi Chen, Hang Shi","doi":"10.1016/j.ijthermalsci.2025.109927","DOIUrl":"10.1016/j.ijthermalsci.2025.109927","url":null,"abstract":"<div><div>In the compression refrigeration cycle system, the double-layered porous domain with small and large porosities respectively in dense and sparse porous layers are set above liquid flow minichannels to form evaporator on bottom heating surface for more heat flux to be enlarged, in which the convection occurs between liquid refrigerant and solid surfaces in channel while evaporation happens in porous layers due to pressure drop. The <span><math><mrow><mi>S</mi><mi>S</mi><mi>T</mi><mspace></mspace><mi>k</mi><mo>−</mo><mi>ω</mi></mrow></math></span> model illustrating the turbulent flow in liquid flow channel together with Darcy-Brinkman model describing the flow in porous domain or ribs are employed to investigate the effects of porosities and thickness respectively in porous ribs and porous domain on thermal performances in presented evaporator. The coefficient of system performance (COP) is utilized to evaluate the ratio of dissipated heat flux to power consumption in refrigeration system. Compared to the evaporator without porous ribs, the 131 % rise of dissipated heat flux can be obtained in mode with porous ribs paved on side wall surface in liquid channel. Besides, the larger dissipated heat flux and higher COP occur with larger and smaller porosities respectively in dense and sparse porous domains above flow channel in evaporator.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":"Article 109927"},"PeriodicalIF":4.9,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816642","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

Jet impingement heat transfer over surfaces with transverse high ribs at low Reynolds numbers pertinent to aeroengine ACC system

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-10 DOI: 10.1016/j.ijthermalsci.2025.109922

Yihui Xiong, Yu Rao, Yuli Cheng

{"title":"Jet impingement heat transfer over surfaces with transverse high ribs at low Reynolds numbers pertinent to aeroengine ACC system","authors":"Yihui Xiong, Yu Rao, Yuli Cheng","doi":"10.1016/j.ijthermalsci.2025.109922","DOIUrl":"10.1016/j.ijthermalsci.2025.109922","url":null,"abstract":"<div><div>The Active Clearance Control (ACC) system utilizes multiple jet impingement to cool the turbine casing of aero engines, aiming to reduce the tip clearance through thermal contraction. This study models the flange structures at the external turbine casing as transverse high ribs, and the performance of ACC configurations are compared on baseline ‘I’-shaped smooth surface, the ‘L’-shaped high rib surface, and the ‘U’-shaped high rib surface. Experimental study and numerical simulation are carried out to obtain the flow and heat transfer characteristics. The results indicate that the arrangement of transverse high ribs on the target surface significantly influences the flow and heat transfer characteristics. The heat transfer on the high rib is lowered by 23.5 % and 15.5 % on Geometry L and U compared to baseline flat surface, respectively, while the heat transfer on the bottom surface is slightly affected. Based on numerical results, the total heat transfer increases by up to 6.74 % and 122 % on Geometry L and U due to extended wetted area, respectively. As the separation distance elevates, the Nusselt number on the bottom surface reduces by 15.6 % and 20.2 % for Geometry L and U, while the Nusselt number on the high rib increased by 0.5 % and 8.5 %, respectively. The Geometry U has more uniform heat transfer distributions, especially at high separation distances. The discharge coefficients of Geometry I and L are similar for using the same manifolds, and the discharge coefficient of Geometry U is 4.7 % higher for larger outlet to inlet area ratio. Based on the experimental data, Nusselt number correlations of the jet impingement over the total surfaces with different high ribs is developed over low Reynolds number ranging from 1,000 to 10,000, which provide more accurate heat transfer predictions than peer works.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":"Article 109922"},"PeriodicalIF":4.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816644","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

Measurement of thermal diffusivity and conductivity of thin films using laser-line lock-in thermography

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-09 DOI: 10.1016/j.ijthermalsci.2025.109928

Agustín Salazar, Arantza Mendioroz

引用次数: 0

Marangoni condensation of steam-ethanol mixture on wire-wrapped tube: effect of wire pitch on heat transfer augmentation

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-09 DOI: 10.1016/j.ijthermalsci.2025.109912

Ahmad Obeidat , Hafiz Muhammad Ali

{"title":"Marangoni condensation of steam-ethanol mixture on wire-wrapped tube: effect of wire pitch on heat transfer augmentation","authors":"Ahmad Obeidat , Hafiz Muhammad Ali","doi":"10.1016/j.ijthermalsci.2025.109912","DOIUrl":"10.1016/j.ijthermalsci.2025.109912","url":null,"abstract":"<div><div>This study investigates the Marangoni condensation of steam-ethanol mixtures on wire-wrapped tubes at atmospheric pressure, with a constant vapor velocity of 0.48 m/s. Experiments were conducted using various mass ethanol concentrations (0.0125 %, 0.05 %, 0.1 %, and 0.3 %) with a 0.5 mm copper wire diameter, and wire pitches of (1.6 mm, 2 mm, 2.4 mm, and 2.9 mm). Special precautions were taken to eliminate air from the vapor phase and minimize experimental errors. Visual observations revealed distinct condensation modes, transitioning from film-wise condensation for the case of pure steam into pseudo-dropwise condensation with the addition of ethanol. The presence of ethanol improved heat transfer by reducing the film thickness, forming small droplets between the wire windings. Additionally, the wire wrapping increased the surface area, sliced film thickness, and minimized retention, thereby expanding the active surface area and significantly enhancing heat transfer. Both factors were thoroughly investigated to understand their combined effects. The results demonstrate significant improvements in heat transfer performance compared to pure steam, with notable increases in heat flux and heat transfer coefficients. The most significant enhancement ratio, defined as the ratio of observed heat transfer values to those predicted by Nusselt's theory (1916), was 9.9, occurring at an ethanol concentration of 0.1 % and a pitch of 2.9 mm.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":"Article 109912"},"PeriodicalIF":4.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808305","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

Study on heat transfer characteristics of film cooling turbine vane with localized thermal barrier coating

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-09 DOI: 10.1016/j.ijthermalsci.2025.109926

Peng Guan , Chang-Xu Liu , Jia-Ning He , Yan-Ming Liu , Yan-Ting Al , Bo Guan

{"title":"Study on heat transfer characteristics of film cooling turbine vane with localized thermal barrier coating","authors":"Peng Guan , Chang-Xu Liu , Jia-Ning He , Yan-Ming Liu , Yan-Ting Al , Bo Guan","doi":"10.1016/j.ijthermalsci.2025.109926","DOIUrl":"10.1016/j.ijthermalsci.2025.109926","url":null,"abstract":"<div><div>With the increase in turbine inlet temperature, thermal barrier coating (TBC) has become an effective thermal protection technology. Localized TBC outperforms conventional uniform TBC in addressing localized overheating and can also reduce the manufacturing cost of the vane. The film cooling turbine vane has a complex structure, which makes numerical simulations of the vane with localized TBC challenging. This study employs multiphysics-coupled numerical simulations and experimental investigations to analyze the thermal insulation effects of localized TBC on film cooling turbine vanes. A high-fidelity numerical simulation model of a film cooling vane with localized TBC is established, and the effects of localized TBC on different regions of the film cooling vane are observed. The results show that localized TBC applied to the leading edge, midsection of the pressure side, and trailing edge of the film cooling turbine vane exhibit better thermal protection. The maximum temperature reduction is approximately 221 K. Specifically, the surface temperature at the leading edge decreases by approximately 200 K, at the midsection of the pressure side by 150–200 K, at the trailing edge of the pressure side by 100–150 K, and at the trailing edge of the suction side by 50–100 K. The localized TBC not only provides effective thermal insulation during engine operation but also significantly mitigates the sudden temperature fluctuations on the vane surface after engine shutdown. Furthermore, the numerical simulation method used in this paper shows a calculation error of less than 15 % compared with experimental results, confirming the accuracy of the simulation results.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":"Article 109926"},"PeriodicalIF":4.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808306","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

Analysis of full-scale thermal-hydraulic characteristics of sodium-cooled fast reactor core under steady-state and accident scenarios

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-08 DOI: 10.1016/j.ijthermalsci.2025.109909

Zhipeng Yang, Jiacheng Yu, Kai Liu, Hanrui Qiu, Mingjun Wang, Wenxi Tian, G.H. Su

{"title":"Analysis of full-scale thermal-hydraulic characteristics of sodium-cooled fast reactor core under steady-state and accident scenarios","authors":"Zhipeng Yang, Jiacheng Yu, Kai Liu, Hanrui Qiu, Mingjun Wang, Wenxi Tian, G.H. Su","doi":"10.1016/j.ijthermalsci.2025.109909","DOIUrl":"10.1016/j.ijthermalsci.2025.109909","url":null,"abstract":"<div><div>Based on the open-source CFD platform OpenFOAM, CorTAF-SFR has been developed to analyze the 3D thermal-hydraulic characteristics of sodium-cooled fast reactor (SFR) fuel rod assemblies using the finite volume method. The code has been validated against the ORNL-FFM2A and SCARLET-II experiments, demonstrating its accuracy in predicting the thermal-hydraulic behavior of fuel rod assemblies under both steady-state and blockage conditions. The tool was further applied to analyze the thermal-hydraulic performance of the China Experimental Fast Reactor (CEFR) under steady-state operation and accident scenarios. Under steady-state conditions, the average coolant outlet temperature deviation from the design values was within 2.0 K, with significant temperature drops observed at the component interface regions. During an overpower accident, peak temperatures of the coolant, cladding surface, and fuel pellet reached 1028.4 K, 1030.6 K, and 1598.9 K, respectively. In the blockage accident, the temperature of the blocked area increased significantly, and the coolant flow rate at about 150 mm downstream of the blocked area returned to the original level. Detailed analysis revealed the thermal-hydraulic behavior changes during the overpower scenario and the mechanisms of flow and temperature field alterations in blocked regions. These findings are crucial for advancing thermal-hydraulic analysis methods for SFR cores and ensuring reactor safety and performance.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of enhancing heat transfer in three Kenics static mixer utilizing muti-objective optimization

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-08 DOI: 10.1016/j.ijthermalsci.2025.109911

Yanfang Yu , Wenlong Qiao , Huibo Meng , Haijun Wan , Wen Sun , Puyu Zhang , Jingyu Guo , Feng Wang

{"title":"Investigation of enhancing heat transfer in three Kenics static mixer utilizing muti-objective optimization","authors":"Yanfang Yu , Wenlong Qiao , Huibo Meng , Haijun Wan , Wen Sun , Puyu Zhang , Jingyu Guo , Feng Wang","doi":"10.1016/j.ijthermalsci.2025.109911","DOIUrl":"10.1016/j.ijthermalsci.2025.109911","url":null,"abstract":"<div><div>The enhancement of heat transfer efficiency in industrial processes remains a critical technological challenge for achieving optimal energy utilization and minimizing environmental impacts. In light of static mixers efficient heat transfer, this study employs experimental and numerical simulations at <em>Re</em> = 2600 ‒ 17,700 to investigate the influence of various geometric parameters in three Kenics static mixer (TKSM), including elevation angles (<em>α</em> = 0°, 3°, 5°, 7°), deflection angles (<em>θ</em> = 0°, 30°, 60°), and aspect ratios (<em>A</em><sub>r</sub> = 1, 1.25, 1.5). Artificial neural networks and multi-objective genetic algorithms are implemented to predict the geometric structure. Results indicate that the optimal heat transfer performance of TKSM occurs at <em>α</em> = 5° and <em>θ</em> = 60°, demonstrating an improvement of 1.69 %–3.7 % compared to <em>α</em> = 0°; when <em>θ</em> = 0° and <em>α</em> = 7°, the overall heat transfer performance of the <em>α</em> = 7° structure is improved by 6.9 %–11.7 % compared to the unmodified TKSM. Through ANNs modeling, correlations were established between structural parameters, heat transfer performance and fluid resistance, achieving prediction accuracies of 93.84 % and 89.6 % for Nusselt number (<em>Nu</em>) and pressure drop(Δ<em>p</em>), respectively. In the <em>Re</em> range of 2600–8800, the optimal structures are: <em>α</em> = 9°–9.6°, <em>θ</em> = 0.2°–0.5°, and <em>A</em><sub>r</sub> range from 1.39 to 1.46. Compared with the initial structure under the same operating conditions, the comprehensive heat transfer performance is improved by 7.69 %–11.58 %. In the <em>Re</em> range of 8800–17700, the optimal structures are: <em>α</em> = 2.2°–7.4°, <em>θ</em> = 18.9°–60° and <em>A</em><sub>r</sub> range from 1.46 to 1.5, the comprehensive heat transfer performance is improved by 7.85 %–9.84 %.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791311","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

Heat transfer and aerodynamic losses of additively manufactured turbine alloy blades with different surface enhancement post-processing

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-08 DOI: 10.1016/j.ijthermalsci.2025.109914

Phillip M. Ligrani , Christoph Bueschges , Morgan Tatge , Bernhard Weigand , Chelakara Subramanian , Hallie L. Collopy , Zach Taylor , Jason Sheth , Paul Gradl

{"title":"Heat transfer and aerodynamic losses of additively manufactured turbine alloy blades with different surface enhancement post-processing","authors":"Phillip M. Ligrani , Christoph Bueschges , Morgan Tatge , Bernhard Weigand , Chelakara Subramanian , Hallie L. Collopy , Zach Taylor , Jason Sheth , Paul Gradl","doi":"10.1016/j.ijthermalsci.2025.109914","DOIUrl":"10.1016/j.ijthermalsci.2025.109914","url":null,"abstract":"<div><div>With increasing temperatures and pressure ratios, the requirements for rocket engine turbine blades become more demanding. Additive manufacturing (AM) enables production of complex geometries for such an application environment, while using novel alloys, such as GRX-810, an alloy with superior strength and durability at elevated temperatures compared to currently employed alloys. An inherent characteristic of such additively manufactured components is a rough surface texture, which varies depending upon the surface enhancement post processing procedure. With the present investigation, procedures which are considered include as built (AM0 blade), abrasive flow machining (AM5 blade), and chemical polishing in combination with chemical mechanical polishing (AM4 blade). The effects of the resulting surface textures are considered as they affect turbine blade aerodynamic losses, and turbine blade tip surface heat transfer coefficient distributions. To acquire these data, a transonic linear cascade within a transonic/supersonic wind tunnel is utilized, with centrally installed, and additively manufactured GRX-810 turbine blades, which are instrumented for aerodynamic loss and surface heat transfer measurements. Measured wake profile variations for the AM0, AM4, and AM5 blades are a consequence of multiple physical effects and phenomena, with different relative consequences, which depend upon the blade wake location, local blade shape alterations, as well as the character and magnitude of surface roughness. Dimensional heat transfer coefficient values along the tips of the turbine alloy blades are generally larger with the rougher surface textures, which are associated with increased tip gap flow friction, and locally lower tip gap flow Mach numbers.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":"Article 109914"},"PeriodicalIF":4.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799230","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

Theoretical study of bubble departure and lift-off diameters model for evaporation based on microlayer in flow boiling

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-08 DOI: 10.1016/j.ijthermalsci.2025.109906

Wu-han Dong, Ming Gao, Zhong-xiang Shen, Meng-yuan Dang, Li-xin Zhang

{"title":"Theoretical study of bubble departure and lift-off diameters model for evaporation based on microlayer in flow boiling","authors":"Wu-han Dong, Ming Gao, Zhong-xiang Shen, Meng-yuan Dang, Li-xin Zhang","doi":"10.1016/j.ijthermalsci.2025.109906","DOIUrl":"10.1016/j.ijthermalsci.2025.109906","url":null,"abstract":"<div><div>This study was devoted to the theory of microlayer evaporation and bubble dynamics. In subcooled flowing boiling, a theoretical study of the mechanism of heat and mass transfer in vapor bubbles during boiling heat transfer has been carried out. The forces on mononuclear boiling bubbles during subcooled flow boiling are analyzed. In addition, the effect of microlayer evaporation was considered, and microlayer evaporation force has been introduced. Evaporation of the microlayers as between the bottom of a bubble and the heated wall, evaporation of the layer of superheated liquid around the bubble, the condensation of the vapors at the top of a bubble are taken into account on the basis of the bubble dynamics. The prediction models for bubble forces, departure and lift-off diameters were improved. The influence of force on the bubble under the same working conditions was also investigated. Compared with previous experimental results, it was found that the improved model could forecast the diameters of the bubble departure and bubble lift-off well.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":"Article 109906"},"PeriodicalIF":4.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799228","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

Combining surface modification of carbon fiber and introduction of phase change capsules to synergistically improve heat dissipation performance of dual-function polymeric composite

IF 4.9 2区工程技术

International Journal of Thermal Sciences Pub Date : 2025-04-07 DOI: 10.1016/j.ijthermalsci.2025.109923

Junpeng Zhou , Yu Zhao , Chi Yin , Zhengguo Zhang , Ziye Ling , Xiaoming Fang

{"title":"Combining surface modification of carbon fiber and introduction of phase change capsules to synergistically improve heat dissipation performance of dual-function polymeric composite","authors":"Junpeng Zhou , Yu Zhao , Chi Yin , Zhengguo Zhang , Ziye Ling , Xiaoming Fang","doi":"10.1016/j.ijthermalsci.2025.109923","DOIUrl":"10.1016/j.ijthermalsci.2025.109923","url":null,"abstract":"<div><div>Thermally conductive composites are widely employed for heat dissipation of electronic devices, but they suffer from incompatibility between thermally conductive filler and polymeric matrix and lack of a function to relieve thermal shock. Elucidating the relationship between surface modification of thermally conductive filler and interface thermal resistance to optimize thermal conductivity for thermally conductive composite, along with introducing phase change capsules to craft dual-function composite with both heat conduction and storage properties, is expected to address these issues. Herein, we chose polydopamine (PDA)-modified carbon fiber (CF) as a prototype to elucidate relationship between surface modification and interface thermal resistance within polydimethylsiloxane (PDMS)-based composite. Molecular dynamics simulations suggested that the modification with PDA did decrease the interfacial thermal resistance between CF and PDMS, but the loading of PDA needed to be controlled at an appropriate amount. The highest thermal conductivity was achieved by the CF/PDMS composite containing 20 wt% of the optimal PDA-modified CF, which composite was then combined with paraffin@SiO<sub>2</sub> nanocapsules with different mass fractions to craft dual-function composites. The obtained dual-function composites exhibited enhanced thermal conductivity, increased heat storage capacity and decreased hardness with increasing mass fraction of the nanocapsules, all of which changes are positive factors in affecting heat dissipation performance. When loading the nanocapsules at 15 wt%, the obtained dual-function composite achieved much improved heat dissipation performance, accounting for the contributes of both the surface modification with PDA and the introduction of the nanocapsules.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"214 ","pages":"Article 109923"},"PeriodicalIF":4.9,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799229","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