Three-dimensional modelling of coupled leachate and gas flow in bioreactor landfills

Three-dimensional modelling of coupled leachate and gas flow in bioreactor landfills
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生物反应器垃圾填埋场渗滤液和气体流耦合的三维建模

DOI:
10.1016/j.compgeo.2016.11.024
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发表时间:
2017-04
影响因子:
5.3
通讯作者:
Lü Fan
Lü Fan
中科院分区:
工程技术2区
文献类型:
--
作者:
Feng Shi Jin;Lu Shi Feng;Chen H. X.;Fu Wen Ding;Lü Fan

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基于OpenFOAM软件建立了生物反应器垃圾填埋场渗滤液及气体运移的三维两相流模型。Darcy定律和van Genuchten土-水保持曲线模型被纳入到渗滤液和气体流动的控制方程中。引入改进的Picard迭代法求解该模型。已发表的结果有效地验证了所建立的模型。模拟了具有渗滤液回灌井和集气井的三维概念垃圾填埋场。结果表明:渗滤液回灌有利于瓦斯收集,瓦斯对渗滤液回灌的影响可以忽略不计;
A three-dimensional two-phase flow model for leachate and gas transportation in bioreactor landfills has been developed based on OpenFOAM. Darcy’s law and the van Genuchten soil-water retention curve model are incorporated into the governing equations for leachate and gas flow. A modified Picard iteration method is introduced to solve the model. The developed model is effectively verified by published results. A three-dimensional conceptual landfill cell with leachate recirculation well and gas collection well is simulated. The results show that leachate recirculation is beneficial for gas collection, and the effect of gas on leachate recirculation can be neglected if the gas collection well is working.
DOI: --
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