Statistical structure and mean dynamics of developing turbulent shear-wake flows

Statistical structure and mean dynamics of developing turbulent shear-wake flows Shear-wake flows formed from the interaction of two turbulent boundary layers are investigated. Primary focus is on the near-field downstream of the splitter plate. Two velocity ratios and two trailing edge geometries are explored via well-resolved hotwire traverses. Comparison with boundary layer data reveals that the loss of the no-slip condition is at first most apparent in the wall-normal velocity fluctuations. Estimates of the terms in the mean momentum equation are examined. Post-separation, the inertial terms in the mean momentum equation rapidly become dominant throughout the flow. Farther downstream the mean effect of turbulent inertia continues to change sign between the wake center and the freestream, as it does between the wall and freestream in the boundary layer. Unlike in the boundary layer, the mean and turbulent inertia terms retain leading order importance over the viscous force term everywhere. Experiments in Fluids Springer Journals

Statistical structure and mean dynamics of developing turbulent shear-wake flows

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Copyright © 2013 by Springer-Verlag Berlin Heidelberg
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
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