Numerical model of compressible gas flow in soil pollution control Numerical model of compressible gas flow in soil pollution control Numerical model of compressible gas flow in soil pollution control

Article type: Research Article

Authors: Chen, Jia-jun | Wang, Hong-qi | Zhang, Zheng

Affiliations: Institute of Environmental Seiences, State Key Joint Laboratory of Environmental Simulation and Pollution Control. Beijing NormalUniversity, Beijing 100875, China. E-mail: [email protected] | Department of Environmental Science, Beijing Forest University.Beijing 100083, China

Abstract: Based on the theory of fluid dynamics in porous media, a numerical model of gas flow in unsaturated zone is developed with the consideration of gas density change due to variation of air pressure. This model is characterized of its wider range of availability. The accuracy of this numerical model is analyzed through comparison with modeling results by previous model with presumption of little pressure variation and the validity of this numerical model is shown. Thus it provides basis for the designing and management of landfill gas control system or soil vapor ex.action system in soil pollution control.

Keywords: numerical model, compressible gas, landfill gas, migration, soil vapor extraction, pollution control

Journal: Journal of Environmental Sciences, vol. 14, no. 2, pp. 239-244, 2002