Overlapping grids for the simulation of particle interaction at the micro scale--颗粒学报PARTICUOLOGY

Nirschl, H. (2005). Overlapping grids for the simulation of particle interaction at the micro scale. China Particuology, 3(1), 60-67. https://doi.org/10.1016/S1672-2515(07)60166-3

Overlapping grids for the simulation of particle interaction at the micro scale

Hermann Nirschl ^*

Institute for Mechanical Process Engineering, University of Karlsruhe (TH), Germany

10.1016/S1672-2515(07)60166-3

Volume 3, Issues 1–2, April 2005, Pages 60-67

Received 16 February 2005, Accepted 7 March 2005, Available online 14 December 2007.

E-mail: Hermann.Nirschl@mvm.uni-karlsruhe.de

Highlights

Abstract

This paper describes the use of overlapping grids for the calculation of flow around single and multiple-particle configurations at the micro scale. The basic equations for calculation are those for conservation of mass and momentum which are solved using a common Finite-Volume formulation. The hydrodynamic particle-particle and particle-wall interaction can be calculated by using an overlapping or Chimera grid scheme. With the grid structuring procedure it is possible to use simple and structured grids around the particles and the overall main grid geometry. The particle grids are lapped over the main grid such that they can move independently after each time step without remeshing the whole geometry. The paper gives results for the validation of the code developed for general test cases, for a rotating ellipsoid in simple shear flow, the flow around particles attached to a wall, the motion of a particle in the vicinity of a wall and some results for the flow through a packed bed configuration.

Graphical abstract

Keywords

particle flows; numerical simulation; overlapping grids; particle-wall interaction; packed beds

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