A cut-cell finite volume - finite element coupling approach for fluid-structure interaction in compressible flow
| Autor: | Pasquariello, Vito, Hammerl, Georg, Örley, Felix, Hickel, Stefan, Danowski, Caroline, Popp, Alexander, Wall, Wolfgang A., Adams, Nikolaus A. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.jcp.2015.12.013 |
| Popis: | We present a loosely coupled approach for the solution of fluid-structure interaction problems between a compressible flow and a deformable structure. The method is based on staggered Dirichlet-Neumann partitioning. The interface motion in the Eulerian frame is accounted for by a conservative cut-cell Immersed Boundary method. The present approach enables sub-cell resolution by considering individual cut-elements within a single fluid cell, which guarantees an accurate representation of the time-varying solid interface. The cut-cell procedure inevitably leads to non-matching interfaces, demanding for a special treatment. A Mortar method is chosen in order to obtain a conservative and consistent load transfer. We validate our method by investigating two-dimensional test cases comprising a shock-loaded rigid cylinder and a deformable panel. Moreover, the aeroelastic instability of a thin plate structure is studied with a focus on the prediction of flutter onset. Finally, we propose a three-dimensional fluid-structure interaction test case of a flexible inflated thin shell interacting with a shock wave involving large and complex structural deformations. Comment: - minor changes (typos, added missing reference) - published version (Journal of Computational Physics) |
| Databáze: | arXiv |
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