Yu Cheng , Zhenping Wan , Xiaoming Feng , Yuanxiang Long
{"title":"考虑热应力和表面相互作用的热接触传导分形模型","authors":"Yu Cheng , Zhenping Wan , Xiaoming Feng , Yuanxiang Long","doi":"10.1016/j.ijheatmasstransfer.2024.125787","DOIUrl":null,"url":null,"abstract":"<div><p>The thermal contact conductance (TCC) of rough surfaces is a fundamental issue in heat transfer. Thermal stress and asperity interactions have important impacts on the TCC. A new fractal model for predicting the TCC that considers thermal stress and asperity interactions is developed. First, an improved normal contact mechanics model is constructed that considers the asperity deformation, thermal stress, and interactions of a single asperity from a microscopic viewpoint. Then, a new TCC prediction model is proposed according to the improved contact mechanics model and classical heat conduction theory. Furthermore, the predicted values of the TCC are compared with published experimental results and reported models. Finally, the influences of surface topography, temperature differences, and material properties on the TCC are further revealed. This study can provide deep insight into the thermal design of sophisticated equipment.</p></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":5.0000,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fractal model of thermal contact conductance considering thermal stress and asperity interactions\",\"authors\":\"Yu Cheng , Zhenping Wan , Xiaoming Feng , Yuanxiang Long\",\"doi\":\"10.1016/j.ijheatmasstransfer.2024.125787\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The thermal contact conductance (TCC) of rough surfaces is a fundamental issue in heat transfer. Thermal stress and asperity interactions have important impacts on the TCC. A new fractal model for predicting the TCC that considers thermal stress and asperity interactions is developed. First, an improved normal contact mechanics model is constructed that considers the asperity deformation, thermal stress, and interactions of a single asperity from a microscopic viewpoint. Then, a new TCC prediction model is proposed according to the improved contact mechanics model and classical heat conduction theory. Furthermore, the predicted values of the TCC are compared with published experimental results and reported models. Finally, the influences of surface topography, temperature differences, and material properties on the TCC are further revealed. This study can provide deep insight into the thermal design of sophisticated equipment.</p></div>\",\"PeriodicalId\":336,\"journal\":{\"name\":\"International Journal of Heat and Mass Transfer\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.0000,\"publicationDate\":\"2024-06-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Heat and Mass Transfer\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0017931024006185\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0017931024006185","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Fractal model of thermal contact conductance considering thermal stress and asperity interactions
The thermal contact conductance (TCC) of rough surfaces is a fundamental issue in heat transfer. Thermal stress and asperity interactions have important impacts on the TCC. A new fractal model for predicting the TCC that considers thermal stress and asperity interactions is developed. First, an improved normal contact mechanics model is constructed that considers the asperity deformation, thermal stress, and interactions of a single asperity from a microscopic viewpoint. Then, a new TCC prediction model is proposed according to the improved contact mechanics model and classical heat conduction theory. Furthermore, the predicted values of the TCC are compared with published experimental results and reported models. Finally, the influences of surface topography, temperature differences, and material properties on the TCC are further revealed. This study can provide deep insight into the thermal design of sophisticated equipment.
期刊介绍:
International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems.
Topics include:
-New methods of measuring and/or correlating transport-property data
-Energy engineering
-Environmental applications of heat and/or mass transfer