Comparing strategies for parallelizing large scale fluid structure interaction using lattice Boltzmann methods and a physics engine

Lehrstuhl für Informatik 10 (Systemsimulation) Comparing strategies for parallelizing large scale fluid structure interaction using lattice Boltzmann methods and a physics engine-Extension of the paper " Large scale simulation of fluid structure interaction using lattice Boltzmann methods and the physics engine " published by The ANZIAM JOURNAL We compare two strategies for the parallelization of large scale coupled fluid structure interaction with up to 9 million fully resolved rigid bodies incorporated in the flow. The simulation is performed using a 3D lattice Boltzmann solver for the fluid flow and a so-called rigid body physics engine for the treatment of the objects. The numerical algorithms and the paralleliza-tion strategies are discussed in detail. Furthermore, performance results are presented for different test cases on up to 4 080 processor cores. For both methods, advantages and disadvantages are presented and areas of applications are shown. The presented approaches enable a detailed simulation of large scale particulate flows, which are relevant for many industrial applications.