土壤一维热湿传递实验研究与数值模拟_张玲.pdfVIP

43 4 浙　江　大　学　学　报() Vol.43 No.4 2009 4 Journal of Zhejiang University (Engineering Science) Apr.2009 DOI:10.37 5/j.issn.100 -973X.2009.04.031 1 1 2 张　玲 , 陈光明, 黄奕沄 (1. , 310027;2. , 311231) 　:, , ., , , ;3 , , , , , , ., Philip , ., . :;;; :TU 31.1　　　　　　　:A　　　　　:100 -973X(2009)04-0771-06 Experimental study and numerical simulation of one dimensional heat and moisturetransfer in soil 1 1 2 ZHANG Ling , CHEN Guang-ming , H UANG Yi-yun (1.Institute of Ref rigeration and Cry ogenics, Z hej iang University , Hangzhou 310027, China ; 2.Dep artment of Urban Construction Eng ineering , Z hej iang College of Construction, Hangzhou 311231, China) Abstract:An experimental apparatus of one-dimensional heat and moisture transfer for the soil column w as developed to study the influence of temperature change on w ater migration.Then soil w ater content and temperature distribution w ere measured along soil column.Experimental results indicated that heat trans- fer in soil w as very slow, and temperature gradients were bigger near the heated place, meanw hile soil heat transfer went w ith moisture transfer.T he distribution of w ater transfer w as divided into three areas along soil column.The power of w ater transfer is temperature difference in the first area.The temperature difference affects soil-w ater potential, leads to w ater diffusion of heated place and makes the soil dry, heat resistance increase, thus affect heat transfer and temperature distribution of the soil.The experimental results w ere compared with the calculated results by using Philip w ater flux equation of one-dimensional model of heat and moist