Solution Based Mesh Adaptation Applied to Fluid Structure Interaction Computations
47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition
Due to the continuously increasing computer capacity simulations of multi-physics systems belong to one of the options. However, computations of multi-physics systems are still time consuming and therefore acceleration techniques are often used. Solution based mesh adaptation is a commonly used technique to optimize steady and unsteady numerical computations. The question is if solution based mesh adaptation can also be used to increase the efficiency of unsteady fluid structure interaction
... ure interaction (FSI) computations. The current research focuses on the application of solution based mesh adaptation to FSI computations. 1, 2 The FSI solver used in this work is a partitioned solver that consists of a Reynolds Averaged Navier Stokes (RANS) solver for the flow and a rigid body dynamics representation for the structure. The FSI problem concerns a NACA0012 airfoil that is allowed to perform in-plane translations. The performed mesh adaptations consist of refinements that are based on the solution for one or more periods. First results show potential by means of a more detailed representation of flow features in comparison with the solution obtained by using non-adapted grids. Therefore more effort is put in the further development of the preliminary version of the unsteady solution based mesh adaptation, whereby adaptation after each time step and implementation of coarsening are the key-issues. The adaptations are based on the solution of the previous time step(s). With this preliminary version, the unsteady adaptation cannot be applied in combination with FSI yet, however the structure of the code is such, that with few modifications unsteady adaptation with FSI is possible. In this paper, two issues are discussed: firstly the preliminary results for an FSI case with mesh refinements based on the solution of a period and secondly the preliminary results of mesh adaptation applied to an unsteady flow without FSI.