SedFoam-2.0: a 3-D two-phase flow numerical model for sediment transport
SedFoam-2.0: a 3-D two-phase flow numerical model for sediment transport
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DOI：
10.5194/gmd-10-4367-2017
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发表时间：
2017-11
影响因子：
5.1
通讯作者：
J. Chauchat;Zhen Cheng;T. Nagel;C. Bonamy;T. Hsu
中科院分区：
文献类型：
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作者：
J. Chauchat;Zhen Cheng;T. Nagel;C. Bonamy;T. Hsu
抽象。本文提出了一种用于泥沙输运应用的三维两相流求解器SedFoam-2.0。该求解器是从开源CFD（计算流体动力学）工具箱OpenFOAM的2.1.0版本中提供的twoPhaseEulerFoam扩展而来的。在这种方法中，沉积物相被建模为连续体，并且必须为沉积物应力规定本构律。在所提出的求解器中，实现了两种不同的颗粒间应力模型：颗粒流的动力学理论和致密颗粒流流变学μ（I）。对于流体应力，可以模拟层流或湍流状态，并且有三种不同的湍流模型可用于泥沙输运：简单混合长度模型（仅一维配置），k − e和k − ω模型。数值实施证明了四个测试用例：悬浮颗粒的沉积，层流推移质，片流，冲刷在停机坪。这些测试案例说明了SedFoam-2.0的能力，以处理复杂的湍流泥沙输运问题与不同的颗粒间应力和湍流模型的组合。
Abstract. In this paper, a three-dimensional two-phase flow solver, SedFoam-2.0, is presented for sediment transport applications. The solver is extended from twoPhaseEulerFoam available in the 2.1.0 release of the open-source CFD (computational fluid dynamics) toolbox OpenFOAM. In this approach the sediment phase is modeled as a continuum, and constitutive laws have to be prescribed for the sediment stresses. In the proposed solver, two different intergranular stress models are implemented: the kinetic theory of granular flows and the dense granular flow rheology μ(I). For the fluid stress, laminar or turbulent flow regimes can be simulated and three different turbulence models are available for sediment transport: a simple mixing length model (one-dimensional configuration only), a k − e, and a k − ω model. The numerical implementation is demonstrated on four test cases: sedimentation of suspended particles, laminar bed load, sheet flow, and scour at an apron. These test cases illustrate the capabilities of SedFoam-2.0 to deal with complex turbulent sediment transport problems with different combinations of intergranular stress and turbulence models.