| 土体固结与溶质运移三维耦合模型 |
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| 引用本文： | 房远方,张志红,杜修力.土体固结与溶质运移三维耦合模型[J].保鲜与加工,2015(3):53-62. |
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| 作者姓名： | 房远方 张志红 杜修力 |
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| 作者单位： | 北京工业大学 城市与工程安全减灾省部共建教育部重点实验室，北京100124,北京工业大学 城市与工程安全减灾省部共建教育部重点实验室，北京100124,北京工业大学 城市与工程安全减灾省部共建教育部重点实验室，北京100124 |
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| 基金项目： | 国家自然科学基金(51378035) |
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| 摘 要： | 考虑堆场上覆堆积体自重引起的土体固结与溶质运移的耦合效应已成为环境土工领域中的热点问题。在Biot固结理论和溶质运移理论相结合的基础上，以孔隙率作为耦合参量，将固结方程与运移方程相联系，考虑土体固结对溶质运移模型参数的影响，建立了溶质在固结变形土体中运移的三维耦合模型。采用多场耦合有限元软件COMSOL Multiphysics对模型进行了数值求解。数值模拟结果表明，土体固结变形对溶质运移过程具有较强和持久的阻滞作用，导致溶质运移深度以及污染羽范围的减小，在模拟运移20 a时，运移距离减小率已高达27.75%，且随着时间的增加而逐渐增大；溶质在水平方向的迁移距离不可忽略，随着横向水力梯度的增大而增大。
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| 关 键 词： | 固结 运移 耦合 三维模型 |
| 收稿时间： | 2014/11/2 0:00:00 |
Three-dimensional coupled model of consolidation and solute transport for porous media |
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| Fang Yuanfang,Zhang Zhihong and Du Xiuli.Three-dimensional coupled model of consolidation and solute transport for porous media[J].Storage & Process,2015(3):53-62. |
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| Authors: | Fang Yuanfang Zhang Zhihong and Du Xiuli |
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| Institution: | The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124,P.R.China,The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124,P.R.China and The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124,P.R.China |
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| Abstract: | The coupling effect of consolidation caused by the waste and the cover, and the solute transport has been widely studied in the field of environmental civil engineering. Based on Biot consolidation theory and solute transport theory, a three-dimensional coupled model of consolidation and solute transport is thus developed and in the modeltheporosity is thecoupled parameter and consolidation equations is linked with transport equations.The influence of consolidation on solute transport parameters is taken into consideration as well.. Then, the 3D model coupling the consolidation and solute transport is establishedusing the finite elementsoftware COMSOL Multiphysics.The numerical results show that consolidation deformation retards the transport process of solute leading to decrease in contaminant plume and the transport depth in vertical direction and has a strong and long-term influence on the transport of soluteThe transport distance decreasing rate increased over time and reache27.75% in 20 years ; the transport distance in the horizontal direction of contaminant concentration increases with the increasing of lateral hydraulic gradient. |
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| Keywords: | consolidation transport coupled three-dimensional model |
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