| 填埋场释放气体运移数值模型 |
| 摘要点击 806 全文点击 1542 投稿时间：1998-12-09 |
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| 中文关键词 填埋场释放气体 运移 数值模型 |
| 英文关键词 landfill gas migration numerical model |
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| 中文摘要 |
| 以多孔介质流体动力学理论为基础,在考虑填埋场内气体压力变化较小、相应气体密度变化小的情况下建立了填埋场释放气体运移数值模型。该模型具有适用范围广的特点,如边界形状任意、介质性质空间变化。模型中考虑了填埋场中介质含水量变化对气体运移的影响。通过与简单条件下所得解析解的对比分析了本数值模型的精度的可靠性。从而可为填埋场释放气体的环境影响预测和评价及控制系统的设计、管理提供依据。 |
| 英文摘要 |
| Based on the theory of fluid dynamics in porous media,a numerical model of landfill gas migration is developed under presumption of small variation of air pressure,negligible change of gas density.This model is with the characteristic of wider range of its availability,such as any shape of domain and space variation of media property at landfill site.The influence of water content of the media on landfill gas migration is taken into account.The accuracy of this numerical model is analyzed by comparison with the analytical solution in ideal conditions.Thus it provides basis for environmental impact prediction and assessment of landfill gas migration and for designing and management of landfill gas control system. |
