Erosion of Fluid Mud Layers. I: Entrainment Model
Erosion of Fluid Mud Layers. I: Entrainment Model
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DOI：
10.1061/(asce)0733-9429(1997)123:6(504
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发表时间：
1997-06
影响因子：
2.4
通讯作者：
C. Kranenburg;J. Winterwerp
中科院分区：
文献类型：
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作者：
C. Kranenburg;J. Winterwerp
通过对混合层湍流动能方程的积分，并引入一些模拟假设，推导出了一个适用于软泥和浮泥的卷吸模型。由此产生的夹带模型是类似的混合层加深在湖泊和水库的模型，但另外帐户的沉降和夹带床料所需的工作。所考虑的条件是水层流动，而泥层静止。前一层是紊流混合层，它对静止的泥层产生冲刷作用。这种情况可能是由于风的作用或在气流中其他位置产生的湍流造成的。考虑了泥浆的屈服强度以及由于水层中的流动而引起的泥浆层的粘性阻力。大多数经验模型系数从文献中获得。敏感性分析表明，沉降，床层强度和粘度都可以大大降低夹带率。夹带模型开发的实验验证中提出的配套文件。
An entrainment model for fluid mud and soft mud is derived by integrating the equation of turbulent kinetic energy across the mixed layer and introducing some modeling assumptions. The resulting entrainment model is similar to models for mixed-layer deepening in lakes and reservoirs, but in addition accounts for settling and the work needed to entrain bed material. The conditions considered are such that the water layer is flowing, whereas the mud layer is at rest. The former layer is the turbulent mixed layer that erodes the quiescent mud layer. Such conditions may result from wind action or turbulence produced at other locations in the flow. The yield strength of the mud as well as the viscous drag of the mud layer due to the flow in the water layer are taken into account. Most empirical model coefficients are obtained from the literature. A sensitivity analysis shows that settling, bed strength, and viscosity all may substantially reduce entrainment rates. An experimental validation of the entrainment model developed is presented in a companion paper.