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Volume 36 Issue 5
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JIANG Ming-jing, ZHANG Wang-cheng. Coupled CFD-DEM method for soils incorporating equation of state for liquid[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(5): 793-801. DOI: 10.11779/CJGE201405001
Citation: JIANG Ming-jing, ZHANG Wang-cheng. Coupled CFD-DEM method for soils incorporating equation of state for liquid[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(5): 793-801. DOI: 10.11779/CJGE201405001
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Coupled CFD-DEM method for soils incorporating equation of state for liquid

  • 1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical & Underground Engineering, Ministry of Education, Shanghai 200092, China; 3. Centre for Offshore Foundation Systems, University of Western Australia, Perth WA6009, Australia

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  • Received Date: July 22, 2013
  • Published Date: May 20, 2014
    Graphical Abstract
    • Abstract
  • The Tait equation of state for liquid is implemented into the N-S equations-based computational fluid dynamics (CFD). This method is then coupled with the distinct element method (DEM) so as to establish CFD-DEM codes to simulate the porous media with weakly compressive fluid. Firstly, the governing equations for the coupled CFD-DEM method are introduced, including equations for fluid-particle interaction forces, N-S equations, Tait equation of state for liquid and motion equations for particle system. Then, a coupled CFD-DEM scheme is implemented into the DEM commercial software PFC2D. Finally, two benchmarking examples, namely, single particle free settling and one-dimensional consolidation, are used to validate the coupled CFD-DEM method. The results show that in the CFD-DEM simulations the free settling velocity of single particle meets the Stokes's solution, and the excess pore pressure and degree of consolidation at different values of Tv are close to those of the Terzaghi's consolidation theory.
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