The diffusion of vorticity from a plane boundary
Abstract
Any discontinuity in flow at a plane boundary is dispersed by the diffusion of vorticity into a boundary layer and wake. Experimental measurements in the past have been correlated with empirical formulations. A generalization gives both the horizontal component and the vertical component of the mean velocity. In the laminar sublayer the velocity is a solution of the diffusion equation. In the turbulent boundary layer the velocity can be expressed by a Fourier integral. In the free stream there is a vertical persistence of velocity. The computation of velocity is provided by subroutines.
 Publication:

Final Report
 Pub Date:
 February 1988
 Bibcode:
 1988nps..reptV....H
 Keywords:

 Boundary Layers;
 Diffusion;
 Turbulent Boundary Layer;
 Vorticity;
 Wakes;
 Boundary Layer Flow;
 Computation;
 Formulations;
 Fourier Analysis;
 Free Flow;
 Hydrodynamics;
 Laminar Wakes;
 Mean;
 Numerical Analysis;
 Subroutines;
 Velocity Measurement;
 Vertical Orientation;
 Fluid Mechanics and Heat Transfer