Numerical modeling airflow in soil with impact of groundwater

作     者：张晓悦 王栋 张晓乐 陈晓东 

作者机构：Zhejiang Water Conservancy and Hydropower College Hangzhou Branch of the IT Electronics Eleventh Design & Research InstituteScientific and Technological Engineering Co.Ltd. Zhejiang Huadong Safety Technology Engineering Limited Company 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2013年第20卷第5期

页      面：1405-1411页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 070104[理学-应用数学] 0701[理学-数学] 

基　　金：Project(Y5080022) supported by the Natural Science Foundation of Zhejiang Province,China Project(RC1202) supported by Scientific and Technological Program of Water Resources Department of Zhejiang Province in 2012,China Project(Y201224384) supported by Scientific Research Program of Education Department of Zhejiang Province in 2012,China 

主　　题：groundwater water-air flow capillary pressure finite difference method compressed air 

摘      要：In order to simulate the airflow in anhydrous case and the water-air flow in groundwater case, a numerical model of airflow in soil was developed. For the nonlinearity of the governing partial differential equation, the corresponding discretization and linearization methods were given. Due to the mass transfer between air-phase and water-phase, phase states of the model elements were constantly changing. Thus, parameters of the model were divided into primary ones and secondary ones, and the primary variables changing with phase states and the secondary variables can be obtained by their functional relationship with the primary variables. Additionally, the special definite condition of this numerical model was illustrated. Two examples were given to simulate the airflow in soil whether there was groundwater or not, and the effectiveness of the numerical model is verified by comparing the results of simulation with that of exoeriment.