SIMULATIONS OF MIGRATION AND EMISSIONS OF GASES IN SAND-COVER OF LANDFILL
作者单位：Department of Chemical and Environmental EngineeringFaculty of EngineeringUniversiti Putra Malaysia
会议名称：《第三届国际甲烷与氧化亚氮减排技术大会》
会议日期：2003年
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）] 08[工学]
关 键 词：emissions of gases convection porous media CFD simulations.
摘 要：The migrations and emissions of landfill gases in porous sand cover can be estimated with empirical correlations and simulated with a computing fluid dynamics（CFD）*** sand-covers of 0.3 m and 0.6 m are treated as porous *** CFD simulations are particularly useful in capturing the mechanism of migration and emissions of gases under steady and unsteady-state *** is found that the mass transfer may be driven by simultaneous diffusion and buoyancy *** rate of mass transfer is significantly enhanced compared to that of diffusion,generally it is about three times that of pure *** prediction of mass transfer rate by diffusion of gas in stationary fluid in porous media is found to be lower than the prediction from CFD *** CFD simulations can also be designed to predict the level of emissions which must meet regularly standard of health and safety.