{"title":"水平环空介质液体电流体动力增强自然对流换热的数值模拟","authors":"J. Chang, F. Tran","doi":"10.1109/ICDL.1990.202916","DOIUrl":null,"url":null,"abstract":"The electrohydrodynamically enhanced natural convection of dielectric liquids in a horizontally cylindrical annulus was numerically investigated under DC and pulsed applied electric field conditions over the range of Rayleigh number from 10/sup 4/ to 2*10/sup 4/, the Prandtl number from 5 to 7, and the electric Rayleigh number from 0 to 2*10/sup 3/ for the inner-to-outer radius ratio of 2. Simulation results show that the applied, radial, DC electric field always enhances the heat transfer by natural convection process. The velocity and heat transfer enhancement are from a factor of 2 to 20 and from 10% to 30%, respectively, for EI varying from 5*10/sup 2/ to 2*10/sup 3/.<<ETX>>","PeriodicalId":193137,"journal":{"name":"10th International Conference on Conduction and Breakdown in Dielectric Liquids","volume":"32 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1990-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Numerical simulation of electrohydrodynamically enhanced natural convection heat transfer of dielectric liquid in a horizontal annulus\",\"authors\":\"J. Chang, F. Tran\",\"doi\":\"10.1109/ICDL.1990.202916\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The electrohydrodynamically enhanced natural convection of dielectric liquids in a horizontally cylindrical annulus was numerically investigated under DC and pulsed applied electric field conditions over the range of Rayleigh number from 10/sup 4/ to 2*10/sup 4/, the Prandtl number from 5 to 7, and the electric Rayleigh number from 0 to 2*10/sup 3/ for the inner-to-outer radius ratio of 2. Simulation results show that the applied, radial, DC electric field always enhances the heat transfer by natural convection process. The velocity and heat transfer enhancement are from a factor of 2 to 20 and from 10% to 30%, respectively, for EI varying from 5*10/sup 2/ to 2*10/sup 3/.<<ETX>>\",\"PeriodicalId\":193137,\"journal\":{\"name\":\"10th International Conference on Conduction and Breakdown in Dielectric Liquids\",\"volume\":\"32 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1990-09-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"10th International Conference on Conduction and Breakdown in Dielectric Liquids\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICDL.1990.202916\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"10th International Conference on Conduction and Breakdown in Dielectric Liquids","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICDL.1990.202916","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Numerical simulation of electrohydrodynamically enhanced natural convection heat transfer of dielectric liquid in a horizontal annulus
The electrohydrodynamically enhanced natural convection of dielectric liquids in a horizontally cylindrical annulus was numerically investigated under DC and pulsed applied electric field conditions over the range of Rayleigh number from 10/sup 4/ to 2*10/sup 4/, the Prandtl number from 5 to 7, and the electric Rayleigh number from 0 to 2*10/sup 3/ for the inner-to-outer radius ratio of 2. Simulation results show that the applied, radial, DC electric field always enhances the heat transfer by natural convection process. The velocity and heat transfer enhancement are from a factor of 2 to 20 and from 10% to 30%, respectively, for EI varying from 5*10/sup 2/ to 2*10/sup 3/.<>
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