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Numerical investigation of fluid mud motion using a three-dimensional hydrodynamic and two-dimensional fluid mud coupling model

机译：三维水动力和二维流体泥浆耦合模型的流体泥浆运动数值研究

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摘要

A water-fluid mud coupling model is developed based on the unstructured grid finite volume coastal ocean model (FVCOM) to investigate the fluid mud motion. The hydrodynamics and sediment transport of the overlying water column are solved using the original three-dimensional ocean model. A horizontal two-dimensional fluid mud model is integrated into the FVCOM model to simulate the underlying fluid mud flow. The fluid mud interacts with the water column through the sediment flux, current, and shear stress. The friction factor between the fluid mud and the bed, which is traditionally determined empirically, is derived with the assumption that the vertical distribution of shear stress below the yield surface of fluid mud is identical to that of uniform laminar flow of Newtonian fluid in the open channel. The model is validated by experimental data and reasonable agreement is found. Compared with numerical cases with fixed friction factors, the results simulated with the derived friction factor exhibit the best agreement with the experiment, which demonstrates the necessity of the derivation of the friction factor.
机译：基于非结构网格有限体积沿海海洋模型（FVCOM），开发了一种水-流体泥浆耦合模型，以研究流体泥浆运动。使用原始的三维海洋模型求解上覆水柱的水动力和泥沙输送。将水平二维流体泥浆模型集成到FVCOM模型中，以模拟潜在的流体泥浆流。流体泥浆通过沉积物通量，水流和切应力与水柱相互作用。流体泥浆与床层之间的摩擦系数是传统上由经验确定的，其假设是，在流体泥浆屈服面以下，剪应力的垂直分布与在露天的牛顿流体的均匀层流相同。渠道。通过实验数据验证了该模型，并找到了合理的共识。与具有固定摩擦因数的数值实例相比，用导出的摩擦因数模拟的结果与实验显示出最好的一致性，这表明推导摩擦因数的必要性。

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  • 来源
    《Ocean Dynamics》 |2015年第3期|449-461|共13页
  • 作者

    Xiaochen Yang; Qinghe Zhang; Linnan Hao;

  • 作者单位

    Research Institute of Water Resources and Hydropower, Liaoning Province, Shenyang 110003, Liaoning Province, China;

    State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;

    Office of Liaoning Provincial Flood Control and Drought Relief Headquarters, Shenyang 110003, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fluid mud; Two-layer model; Friction factor;

    机译：流体泥;两层模型;摩擦系数;

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