title: Numerical model of compressible gas flow in soil pollution control.
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 extraction system in soil pollution control.
authors.affiliation: Institute of Environmental Sciences, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Normal University, Beijing 100875, China. jeffchen@public.bta.net.cn
authors.forename: Jia-jun
authors.initials: JJ
authors.lastname: Chen
authors.forename: Hong-qi
authors.initials: HQ
authors.lastname: Wang
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D000392:Air Movements; D004787:Environmental Pollution / Q000517:prevention & control; D005740:Gases; D008962:Models, Theoretical; D011312:Pressure; D012037:Refuse Disposal; D015203:Reproducibility of Results; D012989:Soil Pollutants; D014872:Water Movements
chemical_list: D005740:Gases; D012989:Soil Pollutants