自然环境下湿分分层土壤中热湿迁移规律的研究  

STUDY ON HEAT AND MASS MIGRATION AND WATER EVAPORATION IN SOIL WITH DRY SURFACE LAYER UNDER NATURAL ENVIRONMENT CONDITIONS

作　　者：刘炳成[1] 刘伟[1] 王崇琦[1] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074

出　　处：《太阳能学报》2004年第3期299-304,共6页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究发展规划(G2000026303);国家自然科学基金(59976010);教育部博士点专项基金(2000048731)

摘　　要：建立描述存在干饱和层时的土壤热湿传递的数学模型并进行数值模拟,获得自然环境下土壤中温度、湿分分布以及水分蒸发的动态特性,分析干饱和土壤层对土壤热湿迁移及水分蒸发的影响。数值模拟获得实验支持。A general mathematical model for investigating simultaneous heat and moisture transfer and water evaporation in porous soil with unsaturated and dry regions was proposed based on the volume-averaging method and a set of governing equations were developed. By use of numerical method, the transient distributions of temperature and moisture in soil under natural condition were obtained and the influence of dry region on heat and moisture transfer in soil and water evaporation was analyzed.

关 键 词：土壤 干饱和层 非饱和层 土壤温度 水分蒸发 

分 类 号：TK124[动力工程及工程热物理—工程热物理]