SedFoam-2.0: a 3-D two-phase flow numerical model for sediment transport

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...

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Bibliographic Details
Published in:	Geoscientific Model Development 2017-11, Vol.10 (12), p.4367-4392
Main Authors:	Chauchat, Julien, Cheng, Zhen, Nagel, Tim, Bonamy, Cyrille, Hsu, Tian-Jian
Format:	Article
Language:	eng
Subjects:	Bed load Computational fluid dynamics Computer applications Computer simulation Dynamics Environmental Engineering Environmental Sciences Fluid dynamics Fluid flow Fluid mechanics Hydrodynamics Kinetic theory Laminar flow Mathematical models Mechanics Mixing length Morphology Multiphase flow Numerical analysis Numerical models Partial differential equations Physics Rheological properties Rheology Sediment load Sediment transport Sedimentation Sediments Shear stress Soil erosion Stress Stresses Suspended load Theory Three dimensional flow Three dimensional models Transport Turbulence Turbulence models Turbulent flow Two phase flow
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Summary:	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 − ε, 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.
ISSN:	1991-9603 1991-959X 1991-962X 1991-9603 1991-962X