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成层非饱和覆盖层中气水两相扩散模型

关驰 谢海建 楼章华

关驰, 谢海建, 楼章华. 成层非饱和覆盖层中气水两相扩散模型[J]. 力学学报, 2013, 45(2): 171-176. doi: 10.6052/0459-1879-12-313
引用本文: 关驰, 谢海建, 楼章华. 成层非饱和覆盖层中气水两相扩散模型[J]. 力学学报, 2013, 45(2): 171-176. doi: 10.6052/0459-1879-12-313
Guan Chi, Xie Haijian, Lou Zhanghua. GAS-WATER TWO-PHASE DIFFUSION MODEL FOR UNSATURATED LAYERED COVER SYSTEMS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2013, 45(2): 171-176. doi: 10.6052/0459-1879-12-313
Citation: Guan Chi, Xie Haijian, Lou Zhanghua. GAS-WATER TWO-PHASE DIFFUSION MODEL FOR UNSATURATED LAYERED COVER SYSTEMS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2013, 45(2): 171-176. doi: 10.6052/0459-1879-12-313

成层非饱和覆盖层中气水两相扩散模型

doi: 10.6052/0459-1879-12-313
基金项目: 国家自然科学基金(51278452,51008274),浙江省公益性技术应用研究计划(2011C21061)和国家重点基础研究发展计划(2012CB719806)资助项目.
详细信息
    通讯作者:

    谢海建,副教授,研究方向:环境土工和多相流.E-mail:xiehaijian@zju.edu.cn

  • 中图分类号: TU43

GAS-WATER TWO-PHASE DIFFUSION MODEL FOR UNSATURATED LAYERED COVER SYSTEMS

Funds: The project was supported by the National Natural Science Foundation of China (51278452, 51008274), Zhejiang Provincial Public Industry Research Projects (2011C21061) and the National Basic Research Program (2012CB719806).
  • 摘要: 为了研究垃圾填埋场内部生物降解产生的气体(以甲烷为主) 和氧气等在非饱和覆盖层中的运移规律,建立了气体在成层非饱和覆盖层中的一维扩散模型. 该模型考虑了覆盖层含水量瞬态变化和气体扩散的耦合作用. 采用有限元多物理场耦合分析软件COMSOL Multiphysics 4.3进行求解. 其计算结果与前人实验结果能符合得很好. 研究结果表明,对典型垃圾填埋场中厚度为1m的非饱和黏土覆盖层,含水量变化对覆盖层中气体污染物的扩散运移有显著影响. 与含水量稳态变化情况相比,20 d到100 d的运移时间内同一覆盖层深度处耦合含水量作用下,气体相对浓度可以相差接近8倍. 含水量是气体在非饱和覆盖层中不稳定运移的重要影响因素.

     

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出版历程
  • 收稿日期:  2012-11-08
  • 修回日期:  2012-12-10
  • 刊出日期:  2013-03-18

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