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首页> 外文期刊>Mathematical Problems in Engineering >Numerical Modeling of Wave-Current Flow around Cylinders Using an Enhanced Equilibrium Bhatnagar-Gross-Krook Scheme
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Numerical Modeling of Wave-Current Flow around Cylinders Using an Enhanced Equilibrium Bhatnagar-Gross-Krook Scheme

机译：使用增强的平衡Bhatnagar-Gross-Krook方案对圆柱周围的波流流动进行数值模拟

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摘要

Flow around cylinders is a classic issue of fluid mechanics and it has great significance in engineering fields. In this study, a two-dimensional hydrodynamic lattice Boltzmann numerical model is proposed, coupling wave radiation stress, bed shear stress, and wind shear stress, which is able to simulate wave propagation of flow around cylinders. It is based on shallow water equations and a weight factor is applied for the force term. An enhanced equilibrium Bhatnagar-Gross-Krook (BGK) scheme is developed to treat the wave radiation stress term in collision step. This model is tested and verified by two cases: the first case is the flow around a single circular cylinder, where the flow is driven by current, wave, or both wave and current, respectively, and the second case is the solitary waves moving around cylinders. The results illustrate the correctness of this model, which could be used to analyze the detailed flow pattern around a cylinder.
机译：圆柱体周围的流动是流体力学的经典问题，在工程领域具有重要意义。在这项研究中，提出了一个二维流体动力格子玻尔兹曼数值模型，该模型将波辐射应力，床层切应力和风切应力耦合在一起，能够模拟圆柱体周围水流的波传播。它基于浅水方程，权重项应用了权重因子。提出了一种增强的平衡Bhatnagar-Gross-Krook（BGK）方案来处理碰撞步骤中的波辐射应力项。该模型通过两种情况进行了测试和验证：第一种情况是围绕单个圆柱体的流动，其中，该流动分别由电流，波或波和电流共同驱动，第二种情况是孤波在周围移动气瓶。结果说明了该模型的正确性，可用于分析圆柱周围的详细流动模式。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第2期|8516879.1-8516879.9|共9页
  • 作者

    Xing Liming; Liu Haifei; Ding Yu; Huang Wei;

  • 作者单位

    Beijing Normal Univ, Sch Environm, Minist Educ, Key Lab Water & Sediment Sci, Beijing 100875, Peoples R China;

    Beijing Normal Univ, Sch Environm, Minist Educ, Key Lab Water & Sediment Sci, Beijing 100875, Peoples R China;

    Beijing Normal Univ, Sch Environm, Minist Educ, Key Lab Water & Sediment Sci, Beijing 100875, Peoples R China;

    China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China;

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