Coupled three‐dimensional discrete element‐lattice Boltzmann methods for fluid‐solid interaction with polyhedral particles

Summary Interaction between solid particles and fluid is of fundamental interest to scientists and engineers in many different applications—cardiopulmonary flows, aircraft and automobile aerodynamics, and wind loading on buildings to name a few. In geomechanics, particle shape significantly affects...

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Bibliographic Details
Published in:International journal for numerical and analytical methods in geomechanics 2019-10, Vol.43 (14), p.2270-2287
Main Authors: Gardner, Michael, Sitar, Nicholas
Format: Article
Language:English
Subjects:
Aerodynamics
Algorithms
Computational fluid dynamics
Computer simulation
Discrete element method
fluid‐solid interaction
Geomechanics
Hydrodynamics
lattice Boltzmann method
Linear programming
Modelling
Particle shape
polyhedral particles
simplex integration
Wind loads
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Summary:Summary Interaction between solid particles and fluid is of fundamental interest to scientists and engineers in many different applications—cardiopulmonary flows, aircraft and automobile aerodynamics, and wind loading on buildings to name a few. In geomechanics, particle shape significantly affects both particle‐particle and particle‐fluid interaction. Herein, we present a generalized method for modeling the interaction of arbitrarily shaped polyhedral particles and particle assemblages with fluid using a coupled discrete element method (DEM) and lattice Boltzmann method (LBM) formulation. The coupling between DEM and LBM is achieved through a new algorithm based on a volume‐fraction approach to consider three‐dimensional convex polyhedral particles moving through fluid. The algorithm establishes the interaction using linear programming and simplex integration and is validated against experimental data. This approach to modeling the interaction between complex polyhedral particles and fluid is shown to be accurate for directly simulating hydrodynamic forces on the particles.
ISSN:0363-9061
1096-9853
DOI:10.1002/nag.2972