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Pore Network Simulation and Experimental Investigation on Water-Heat Transport Process of Soil Porous Media

机译：孔隙网络仿真与土壤多孔介质水热运输过程的实验研究

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摘要

The research on water-heat transport of soil porous media has important theoretical and practical significance for the problem of agricultural production and environmental governance. In this work, the water-heat transport characteristics of sandy soil porous media are analyzed. The two-dimensional continuum physical model is constructed by continuum method, and the two-dimensional pore network physical model is constructed directly at pore scale by taking into account the complicated pore and skeleton structures of soil. Mathematical models of water-heat transport process of sandy soil are constructed based on heat-mass transfer mechanism. Mathematical models of the continuum method and pore network method are solved by ANSYS and self-designed solving algorithm, respectively. The numerical simulation results of soil temperature distributions and moisture distributions are in good agreement with the experimental results. The pore network simulation results are in good agreement with the measured data and are superior to the existing continuous scale method. The pore network simulation results can directly present the characteristics of the preferential flow and wetting front during the water-heat transport process of soil.
机译：土壤多孔介质水热输送研究对农业生产与环境治理问题具有重要的理论和实践意义。在这项工作中，分析了砂土多孔介质的水热传递特性。通过连续的方法构建二维连续体物理模型，通过考虑到土壤的复杂孔和骨架结构，直接以孔隙秤直接构建二维孔网络物理模型。基于热传质机制构建砂土水热输送过程的数学模型。 ANSYS和自行设计求解算法解决了连续性方法和孔网络方法的数学模型。土壤温度分布和水分分布的数值模拟结果与实验结果吻合良好。孔隙网络仿真结果与测量数据吻合良好，并且优于现有的连续比例方法。孔网仿真结果可以直接呈现在土壤水热输送过程中优先流量和润湿前线的特性。

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  • 来源
    《Journal of Heat Transfer》 |2019年第6期|062601.1-062601.11|共11页
  • 作者

    Yuan Yuejin; Tan Libin; Zhao Zhe; Xu Yingying; Bai Miaomiao; Yuan Yueding;

  • 作者单位

    Shaanxi Univ Sci & Technol Coll Mech & Elect Engn 6 Xuefuzhong Rd Xian 710021 Shaanxi Peoples R China;

    Shaanxi Univ Sci & Technol Coll Mech & Elect Engn 6 Xuefuzhong Rd Xian 710021 Shaanxi Peoples R China|Fundamental Res Inst R&D Ctr Computat Fluid Dynam Res Lab Chongqing 400039 Peoples R China;

    Shaanxi Univ Sci & Technol Coll Mech & Elect Engn 6 Xuefuzhong Rd Xian 710021 Shaanxi Peoples R China;

    Shaanxi Univ Sci & Technol Coll Mech & Elect Engn 6 Xuefuzhong Rd Xian 710021 Shaanxi Peoples R China;

    Shaanxi Univ Sci & Technol Coll Mech & Elect Engn 6 Xuefuzhong Rd Xian 710021 Shaanxi Peoples R China;

    Yichun Univ Coll Math & Comp Sci Yichun 336000 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    soil; porous media; water-heat transport; numerical simulation; pore network;

    机译：土壤;多孔介质;水热运输;数值模拟;孔网络;

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