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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN:
1-56700-135-1 (Print)

ANALYSIS OF SUBGRID SCALES AND SUBGRID SCALE MODELING FOR SHOCK-BOUNDARY-LAYER INTERACTION

Steffen Stolz
Institut fur Fluiddynamik ETH Zurich, ETH Zentrum, CH-8092 Zurich, Switzerland

N. A. Adams
Institute of Fluid Dynamics, ETH Zürich, ETH Zentrum, CH-8092 Zürich, Switzerland

Leonhard Kleiser
Institute of Fluid Dynamics ETH Zurich ETH Zentrum, CH-8092 Zurich, Switzerland

Abstract

An alternative approach to large-eddy simulation based on approximate deconvolution (ADM) is compared with standard subgrid scale models by a priori tests for supersonic compression ramp flow. With ADM an approximation of the non-filtered field is obtained by truncated series expansion of the inverse filter operator. Scale-similarity model and ADM give the best correlation of subgrid scale terms with filtered DNS data. Lower correlations are obtained with the dynamic mixed model, the dynamic Smagorinsky model, and the standard Smagorinsky model. It is also found that explicit compressible subgrid scale contributions cannot be neglected and require modeling.