{"title":"Heat and mass transfer analysis and modeling in unsaturated ground soils for buried tube systems","authors":"V.M. Puri","doi":"10.1016/0167-5826(87)90001-5","DOIUrl":null,"url":null,"abstract":"<div><p>The performance of a single pipe carrying warm fluid buried in a medium wet sand is described in this paper. A finite element model is used to analyze the heat and moisture movement in a pipe-soil cross-section perpendicular to pipe length. System variables included are: pipe diameter, initial soil moisture concentration and temperature, and fluid-tube interface temperature. The time varying soil moisture concentrations and temperatures are graphically presented. Soil moisture profiles evolve at a slower rate than the temperature distribution functions. For fluid-tube interface temperature of 32°C and initial soil moisture concentration of 30%, moisture in pipe velocity will fall below 25% after 48 h.</p></div>","PeriodicalId":100470,"journal":{"name":"Energy in Agriculture","volume":"6 3","pages":"Pages 179-193"},"PeriodicalIF":0.0000,"publicationDate":"1987-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-5826(87)90001-5","citationCount":"28","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy in Agriculture","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0167582687900015","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 28
Abstract
The performance of a single pipe carrying warm fluid buried in a medium wet sand is described in this paper. A finite element model is used to analyze the heat and moisture movement in a pipe-soil cross-section perpendicular to pipe length. System variables included are: pipe diameter, initial soil moisture concentration and temperature, and fluid-tube interface temperature. The time varying soil moisture concentrations and temperatures are graphically presented. Soil moisture profiles evolve at a slower rate than the temperature distribution functions. For fluid-tube interface temperature of 32°C and initial soil moisture concentration of 30%, moisture in pipe velocity will fall below 25% after 48 h.
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