Turbulence structure and scales in canopy-wake reattachment

2021 ◽  
Vol 6 (11) ◽  
Author(s):  
Hayoon Chung ◽  
Jeffrey Koseff
Keyword(s):  
Turbulence Structure

Statistical Analysis of the Turbulence Structure Downstream of a Short Roughness Strip

2007 ◽  
Vol 34 (2) ◽  
pp. 179-190
Author(s):  
M. O. Oyewola ◽  
M. S. Adaramola ◽  
A. O. Olaberinjo ◽  
O. A. Obiyemi
Keyword(s):  
Statistical Analysis ◽  
Turbulence Structure ◽  
Roughness Strip

Turbulence structure in the spiral wake shed by a lifting wing

AIAA Journal ◽  
1998 ◽  
Vol 36 ◽  
pp. 658-660
Author(s):  
Joseph A. Miranda ◽  
William J. Devenport
Keyword(s):  
Turbulence Structure

The turbulence structure of the wake of a thin flat plate at post-stall angles of attack

2017 ◽  
Vol 58 (6) ◽  
Author(s):  
Meraj Mohebi ◽  
David H. Wood ◽  
Robert J. Martinuzzi
Keyword(s):  
Flat Plate ◽  
Turbulence Structure

Turbulence structure of a reattaching mixing layer

1981 ◽  
Vol 110 ◽  
pp. 171-194 ◽  
Author(s):  
C. Chandrsuda ◽  
P. Bradshaw
Keyword(s):  
Boundary Layer ◽  
Shear Stress ◽  
Reynolds Shear Stress ◽  
Mixing Layer ◽  
Three Dimensional ◽  
Flow Region ◽  
Turbulent Energy ◽  
Turbulence Structure ◽  
Hot Wire ◽  
Recirculating Flow

Hot-wire measurements of second- and third-order mean products of velocity fluctuations have been made in the flow behind a backward-facing step with a thin, laminar boundary layer at the top of the step. Measurements extend to a distance of about 12 step heights downstream of the step, and include parts of the recirculating-flow region: approximate limits of validity of hot-wire results are given. The Reynolds number based on step height is about 105, the mixing layer being fully turbulent (fully three-dimensional eddies) well before reattachment, and fairly close to self-preservation in contrast to the results of some previous workers. Rapid changes in turbulence quantities occur in the reattachment region: Reynolds shear stress and triple products decrease spectacularly, mainly because of the confinement of the large eddies by the solid surface. The terms in the turbulent energy and shear stress balances also change rapidly but are still far from the self-preserving boundary-layer state even at the end of the measurement region.

The response of a turbulent boundary layer to lateral divergence

1979 ◽  
Vol 94 (2) ◽  
pp. 243-268 ◽  
Author(s):  
A. J. Smits ◽  
J. A. Eaton ◽  
P. Bradshaw
Keyword(s):  
Boundary Layer ◽  
Circular Cylinder ◽  
Turbulent Boundary Layer ◽  
Structural Parameters ◽  
Axial Flow ◽  
Turbulence Structure ◽  
Two Dimensional ◽  
Transition Section ◽  
Two Dimensional Flow ◽  
Made In

Measurements have been made in the flow over an axisymmetric cylinder-flare body, in which the boundary layer developed in axial flow over a circular cylinder before diverging over a conical flare. The lateral divergence, and the concave curvature in the transition section between the cylinder and the flare, both tend to destabilize the turbulence. Well downstream of the transition section, the changes in turbulence structure are still significant and can be attributed to lateral divergence alone. The results confirm that lateral divergence alters the structural parameters in much the same way as longitudinal curvature, and can be allowed for by similar empirical formulae. The interaction between curvature and divergence effects in the transition section leads to qualitative differences between the behaviour of the present flow, in which the turbulence intensity is increased everywhere, and the results of Smits, Young & Bradshaw (1979) for a two-dimensional flow with the same curvature but no divergence, in which an unexpected collapse of the turbulence occurred downstream of the curved region.

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