Research Topic

Hybrid Turbulence Models in Context of Fluid-Structure Interaction

Hybrid Methods in Context of Fluid-Structure Interaction Problems

Generally, a fluid flow can either be in a laminar or turbulent stage. However, most of the flows in engineering applications are turbulent. In order to simulate such flows, all scales of turbulence either have to be resolved or modeled somehow. A typical modeling approach would be the use of a RANS model, where all scales are modeled. With the increasing computational power available, so-called hybrid models, combining LES and RANS methods, became more attractive in the last decade. Those techniques are considered to be a promising attempt with respect to accuracy and computational costs. A significant improvement on the results for separated flows could be shown in many different publications over the years. In the present work, the performance of such an hybrid model (DES) is investigated in the context of fluid-structure interaction problems. Due to the moving meshes, the flow topology may change significantly for attached to separated flows at different locations. Typical RANS models might fail at the prediction of such large separation zones. Although hybrid methods work well on steady grids, it is not quite clear, how they can deal with strongly varying RANS-LES Zones. This work will contribute to the answer of that question.

Key Research Area

Multi-Physics – Turbulence

Contact

Sebastian Türk
M.Sc.

Address:

Dolivostraße 15

D-64293 Darmstadt

Germany

Phone:

+49 6151 16 - 24401 or 24402

Fax:

+49 6151 16 - 24404

Office:

S4|10-307

Email:

tuerk (at) gsc.tu...

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