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A Lattice Boltzmann Approach for Distributed Three-dimensional Fluid-Structure Interaction
Abstract
This work investigated the validity and efficiency of the coupling of the Lattice Boltzmann Method with finite element schemes as well as rigid body approaches to model fluid-structure interaction (FSI). The results on two- and three-dimensional benchmark configurations are very promising and show that an explicit coupling scheme is able to produce accurate results which agree with reference solutions very well. The underlying fluid solver VIRTUALFLUIDS is based on adaptive hierarchical grids and component technology for
parallelization. One target application is the simulation of a jet induced by a ship propeller which poses a substantial challenge to both the numerical scheme as well as to the software parallelization concept. Furthermore, the coupling to a rigid body dynamics engine (PhysicsEngine-pe) leads to the possiblity to compute FSI problems with a huge number of particles which is the basis for numerical simulations in geothermic drilling, where the particles eroded by the drill head influence the fluid dynamics. A free surface Lattice Boltzmann approach coupled with rigid body motions shows further potential and demonstrates
the broad applicability of the developed algorithms.
... VirtualFluids is a Computational Fluid Dynamics research code developed at the Institute for Computational Modeling in Civil Engineering (IRMB) at TU Braunschweig. Based on the Lattice Boltzmann Method (LBM), VirtualFluids aims to provide fast and reliable numerical solutions for various kinds of flow problems ranging from turbulent flow to multi-field problems such as Fluid-Structure-interaction [52]. Because flow simulations quickly become very expensive in terms of computing time, VirtualFluids supports both a GPU parallelization based on CUDA and a CPU parallelization based on MPI and OpenMP. ...
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