Coupled discrete element and finite volume solution of two classical soil mechanics problems |
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| Authors: | Feng Chen Eric C Drumm Georges Guiochon |
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| Institution: | 1. Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, USA;2. Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, TN 37996-4531, USA;3. Department of Chemistry, University of Tennessee, Knoxville, TN, 37996-1600, and Division of Chemical Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6120, USA |
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| Abstract: | One dimensional solutions for the classic critical upward seepage gradient/quick condition and the time rate of consolidation problems are obtained using coupled routines for the finite volume method (FVM) and discrete element method (DEM), and the results compared with the analytical solutions. The two phase flow in a system composed of fluid and solid is simulated with the fluid phase modeled by solving the averaged Navier–Stokes equation using the FVM and the solid phase is modeled using the DEM. A framework is described for the coupling of two open source computer codes: YADE-OpenDEM for the discrete element method and OpenFOAM for the computational fluid dynamics. The particle–fluid interaction is quantified using a semi-empirical relationship proposed by Ergun 12]. The two classical verification problems are used to explore issues encountered when using coupled flow DEM codes, namely, the appropriate time step size for both the fluid and mechanical solution processes, the choice of the viscous damping coefficient, and the number of solid particles per finite fluid volume. |
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| Keywords: | Discrete element method Finite volume method Open source code Coupled flow problem 1D upward seepage flow 1D consolidation |
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