A parallelisation concept for a multi-physics lattice Boltzmann prototype based on hierarchical grids. (1st May 2008)

• Record Type: Journal Article
• Authors: Freudiger, Soren; Hegewald, Jan; Krafczyk, Manfred
• Is Part Of: Progress in computational fluid dynamics. Volume 8:Number 1-4(2008)
• Page Start: 168
• Page End: 178
• Publication Date: 2008-05-01
• Subjects: lattice Boltzmann method -- parallel computation -- distributed systems -- non-uniform grid -- MPI -- metis -- tandem cylinders -- simulation -- cylinder flow -- hierarchical grids; Fluid dynamics -- Data processing -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 620.10640285
• Languages: English
• ISSNs: 1468-4349

Abstract

This paper introduces a generalised parallelisation concept for lattice Boltzmann (LB) simulations. Our main goal was to combine two approaches to speed up LB computations: parallelisation combined with an efficient implementation and utilisation of non uniform tree-type Cartesian grids. A clear separation of data with different semantics (i.e., topology, geometry, physical quantities) to facilitate expandability for multi-physics applications is another key aspect of this work. In addition, an abstract rule set was developed which can handle e.g., specific user definable discretisation stencils. Finally we simulated a tandem cylinder flow to validate the method as well as the implementation in 2D.