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The lattice Boltzmann method is a simulation technique in computational fluid dynamics. In its standard formulation, it is restricted to regular computation grids, second-order spatial accuracy, and a unity Courant-Friedrichs-Lewy (CFL) number. This paper advances the standard lattice Boltzmann method by introducing a semi-Lagrangian streaming step. The proposed method allows significantly larger time steps, unstructured grids, and higher-order accurate representations of the solution to be used. The appealing properties of the approach are demonstrated in simulations of a two-dimensional Taylor-Green vortex, doubly periodic shear layers, and a three-dimensional Taylor-Green vortex.

SUMMARYMany industrial and scientific applications are characterized by the interaction of different disciplines, such as fluid-structure interactions. For the individual disciplines sophisticated and validated solvers exist. This paper describes basic ideas, implementation details and application of MpCCI (mesh-based parallel code coupling interface), a tool for the coupling of different simulation codes.

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