Yanhui Zhang, Qinmeng Jiang, Qingxun Tan, Yi Liu, Jianjun Zhu, Jianli Wang
{"title":"Numerical analysis on heat transfer of porous wick flat micro heat pipe under various operating conditions","authors":"Yanhui Zhang, Qinmeng Jiang, Qingxun Tan, Yi Liu, Jianjun Zhu, Jianli Wang","doi":"10.1016/j.icheatmasstransfer.2024.107842","DOIUrl":null,"url":null,"abstract":"Flat micro heat pipes (FMHPs), which have excellent heat transfer performance, have been widely applied in thermal management. A three-dimensional transient numerical model of an FMHP with copper foam and spiral woven mesh composite wick is developed in this work. The volume of fluid method is utilized to simulate the vapor-liquid phase change and circulating flow in the FMHP. The effect of unsaturated flow in porous media is considered in the composite wick domain, which improves the accuracy of simulations of porous wick heat pipes at high heat fluxes. The simulation and experimental results are in good agreement, with the maximum relative uncertainty of about 1.03%. The heat transfer performance of the FMHP is simulated and analyzed at different heat fluxes, tilt angles, and heat dissipation conditions. The results show that the wall temperature of FMHP reaches a steady state in <30 s under different working conditions. Compared with the horizontal condition, the total thermal resistance decreases by about 16% when the tilt angle is 30°. These simulation results provide valuable references in selecting the operating environment, mounting method, and cooling conditions of the FMHP.","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":6.4000,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Communications in Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.icheatmasstransfer.2024.107842","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0
Abstract
Flat micro heat pipes (FMHPs), which have excellent heat transfer performance, have been widely applied in thermal management. A three-dimensional transient numerical model of an FMHP with copper foam and spiral woven mesh composite wick is developed in this work. The volume of fluid method is utilized to simulate the vapor-liquid phase change and circulating flow in the FMHP. The effect of unsaturated flow in porous media is considered in the composite wick domain, which improves the accuracy of simulations of porous wick heat pipes at high heat fluxes. The simulation and experimental results are in good agreement, with the maximum relative uncertainty of about 1.03%. The heat transfer performance of the FMHP is simulated and analyzed at different heat fluxes, tilt angles, and heat dissipation conditions. The results show that the wall temperature of FMHP reaches a steady state in <30 s under different working conditions. Compared with the horizontal condition, the total thermal resistance decreases by about 16% when the tilt angle is 30°. These simulation results provide valuable references in selecting the operating environment, mounting method, and cooling conditions of the FMHP.
期刊介绍:
International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.