The structure of sheared turbulence near a plane boundary
Abstract
An analysis is presented of how a plane boundary affects the structure of turbulence in a sheared free stream. A uniformshear boundary layer (USBL) is formulated with slip velocity condition at the surface, and inhomogeneous rapid distortion theory is applied. The effects of blocking by the surface on the turbulence structure in USBL is compared with those in the shearfree boundary layer (SFBL). Shear produces highly anisotropic eddies elongated in the flow direction. The vertical velocity variance is reduced with shear at all heights, roughly in proportion to the reduction in the homogeneous value, but the shape of the profile remains unchanged only near the surface. The streamwise integral scales increase with shear, indicating elongation of the streamwise extent of eddies.
 Publication:

Studying Turbulence Using Numerical Simulation Databases, 2
 Pub Date:
 December 1988
 Bibcode:
 1988stun.proc..221L
 Keywords:

 Boundary Layers;
 Flow Distribution;
 Shear Flow;
 Turbulent Flow;
 Computational Fluid Dynamics;
 Flow Stability;
 Free Flow;
 Shear Stress;
 Vortices;
 Fluid Mechanics and Heat Transfer