ARTICLE:

• DNS and Wavelet Analysis of a Turbulent Channel Flow Rotating about the Streamwise Direction  download article

T. Weller
Department of Mechanical Engineering, Chair of Fluid Dynamics, Technische Universität, Darmstadt, Petersenstr. 13, 64287 Darmstadt, Germany

K. Schneider
Laboratoire de Modélisation et Simulation Numérique en Mécanique, CNRS et Universités d'Aix-Marseille & CMI, Université de Provence, 39 rue Frédéric Joliot-Curie, 13453 Marseille, France

M. Oberlack
Department of Mechanical Engineering, Chair of Fluid Dynamics, Technische Universität, Darmstadt, Petersenstr. 13, 64287 Darmstadt, Germany

M. Farge
Laboratoire de Météorologie Dynamique, CNRS et Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris, France

ABSTRACT

In this contribution a study of a turbulent channel flow rotating about the streamwise direction is presented by using direct numerical simulation (DNS). The theory giving a theoretical basis for the mean flow is based on the investigations of [9] employing symmetry group theory. It was found both in DNS and in the theory that a cross flow in the spanwise direction is induced. Statistical evaluations have shown that all six components of the Reynolds stress tensor are non-zero. A series of DNS has been conducted at Reynolds number Re_τ = 180 for both the non-rotating case and different rotation numbers up to Ro = 20 to examine the effects of rotation. Further a wavelet analysis has been performed for selected data sets computations to identify and extract coherent vorticities.

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163-166 pages

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