Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/gmd-2017-101
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Model description paper
07 Jun 2017
Review status
This discussion paper is under review for the journal Geoscientific Model Development (GMD).
SedFoam-2.0: a 3D two-phase flow numerical model for sediment transport
Julien Chauchat1, Zhen Cheng2,a, Tim Nagel1, Cyrille Bonamy1, and Tian-Jian Hsu2 1University of Grenoble Alpes, LEGI, G-INP, CNRS, F-38000 Grenoble, France
2Civil and Environmental Engineering, Center for Applied Coastal Research, University of Delaware, Newark, DE 19711, USA
anow at: Applied Ocean Physics & Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Abstract. In this paper, a three-dimensional two-phase flow solver, SedFoam-2.0, is presented for sediment transport applications. The solver is extended upon twoPhaseEulerFoam available in the 2.1.0 release of the open-source CFD 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 inter-granular 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 first demonstrated by two validation test cases, sedimentation of suspended particles and laminar bed-load. Two applications are then investigated to illustrate the capabilities of SedFoam-2.0 to deal with complex turbulent sediment transport problems with different combinations of inter-granular stress and turbulence models.

Citation: Chauchat, J., Cheng, Z., Nagel, T., Bonamy, C., and Hsu, T.-J.: SedFoam-2.0: a 3D two-phase flow numerical model for sediment transport, Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2017-101, in review, 2017.
Julien Chauchat et al.
Julien Chauchat et al.
Julien Chauchat et al.

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Short summary
This manuscript presents the development and validation of a community two-phase flow Eulerian-Eulerian model based on openFoam for sediment transport applications. The mathematical and numerical models are described in details. Two simple validation test cases, sedimentation and a pressure driven sediment transport in the laminar flow regime, are presented. Finally, the model is applied to two reallistic sediment transport configurations, intense bed-load transport and scour at an apron.
This manuscript presents the development and validation of a community two-phase flow...
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