Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6930732 | Journal of Computational Physics | 2016 | 26 Pages |
Abstract
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.
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Physical Sciences and Engineering
Computer Science
Computer Science Applications
Authors
Vito Pasquariello, Georg Hammerl, Felix Ãrley, Stefan Hickel, Caroline Danowski, Alexander Popp, Wolfgang A. Wall, Nikolaus A. Adams,