E101-03-1 - Forschungsgruppe Computational Mathematics in Engineering
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Journal:
Journal of Computational Physics
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ISSN:
0021-9991
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Date (published):
15-Nov-2023
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Publisher:
ACADEMIC PRESS INC ELSEVIER SCIENCE
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Peer reviewed:
Yes
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Keywords:
Discontinuous Galerkin; High-order finite elements; Implicit large eddy simulation; Turbulent channel and periodic hill flow; Under-resolved turbulence simulations
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Abstract:
We assess the ability of three different approaches based on high-order discontinuous Galerkin methods to simulate under-resolved turbulent flows. The capabilities of the mass conserving mixed stress method as structure resolving large eddy simulation solver are examined. A comparison of a variational multiscale model to no-model or an implicit model approach is presented via numerical results. In addition, we present a novel approach for turbulent modeling in wall-bounded flows. This new technique provides a more accurate representation of the actual subgrid scales in the near wall region and gives promising results for highly under-resolved flow problems. In this paper, the turbulent channel flow and periodic hill flow problem are considered as benchmarks for our simulations.