Journal of Applied Mechanical Engineering

A coupled CFD-DEM immersed boundary method for solid-liquid two-phase flows with emphasis on sedimentation benchmarks

3^rd International Conference on Fluid Dynamics & Aerodynamics

October 25-26, 2018 | Berlin, Germany

Khuram Walayat

Peking University, China

Posters & Accepted Abstracts: J Appl Mech Eng

Abstract:

This paper presents a coupled solver, computational fluid dynamics (CFD) with discrete element method (DEM). Due to the rapid growth in computational power and resources in the recent past, CFD-DEM becomes a very promising and feasible tool for the simulation of moving rigid bodies along with the surrounding fluid flow. CFD based on finite volume method (FVM), which is used to model the fluid flow while DEM solves the motion of solid particles. Immersed boundary method (IBM) is used to treat the particles inside the fluid. IBM takes account of the interaction between the particles and the surrounding fluid. The presented approach allows using both static or dynamic grids with structured or unstructured meshes. The results for a single settling sphere at different Reynold???s numbers are presented and compared with the benchmarks. The obtained results show very good agreement with benchmark results. The comparison shows that the presented method can accurately simulate 3D particulate flows in numerous physical settings. This coupled framework is based on OpenFOAM and LIGGGHTS to simulate the fluid-solid two-phase flow. IBM is used, which is responsible to handle the fluid particle interaction and to accurately calculate the momentum transfer between the two phases. The comparison of results leads us to the conclusion that the coupled CFD-DEM-IBM is able to efficiently and accurately predict particle motion in fluid at different Reynolds numbers and to resolve the associated flow features precisely.

Biography :

E-mail: khuram.walayat@gmail.com