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DNS of the interaction between a shock wave and a turbulent shear flow: some effects of anisotropy

Crespo, Matthieu and Jamme, Stéphane and Chassaing, Patrick DNS of the interaction between a shock wave and a turbulent shear flow: some effects of anisotropy. (2007) In: 5th International Symposium on Turbulence and Shear Flow Phenomena (TSFP5), 27-29 Aug 2007, Munich, Allemagne .

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Abstract

Direct numerical simulation is used to study the interaction of a Mach 1.5 shock wave and various types of anisotropic turbulent flows. We compare the interaction of isotropic, axisymmetric and sheared turbulences (sometimes combined), with a specific interest for the sheared situation. The sign and magnitude of the correlation between the velocity and temperature fluctuations are found to have a crucial influence on the kinetic energy amplification across the shock. A decrease in magnitude is observed during the interaction for the velocity cross-correlation. The balance equation of this quantity is investigated and the terms responsible for this behaviour are identified. The shear stress effect upon fluctuating vorticity and the dissipation length scale is also presented. Thermodynamic fluctuations are finally analyzed, showing the departure from the isentropic state in the sheared situation compared to the isotropic one.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Stéphane Jamme

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