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ON THE INVESTIGATION OF A STRAIN AND ROTATION DEPENDENT SUBGRID-SCALE MODEL USING THE DYNAMIC PROCEDURE

Ingmar Wendling
Fluid- and Hydromechanics Group, Technische Universitat Darmstadt Petersenstr. 13, 64287 Darmstadt, Germany

Martin Oberlack
Chair of Fluid Dynamics, Dept. Mech. Eng., TU Darmstadt, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany; Center of Smart Interfaces, TU Darmstadt, Germany; GS Computational Engineering, TU Darmstadt, Germany

Abstract

An anisotropic subgrid-scale model with five terms depending on strain and rotation rate is investigated. Single terms and the combinations of two of the five terms are tested in a turbulent channel flow at a turbulent Reynolds number of Reτ = 395. The model constants, one for each term, are determined dynamically. Some models with a combination of two terms achieved slightly better results than the single term models with about 25% additional computational costs compared to the Germano model.