Computer simulation of the time varying velocity field in the viscous wall region (y/+/ between 0 and 40)
Abstract
A simple model for the floworiented eddies in the viscous wall region is explored which assumes them to be associated with spanwise velocity fluctuations at the edge of the viscous wall region (y/+/ = 40) which are homogeneous in the flow direction and have a period in the zdirection equal to the observed streak spacing (lambda/+/ = 100). The velocity field calculated by solving the unaveraged NavierStokes equations agrees with measurements. This agreement suggests that the model correctly describes the production of turbulent kinetic energy close to the wall. Furthermore, an interesting selection process is observed whereby the fluctuating streamwise velocity field close to the wall does not respond to all of the frequencies of the velocity fluctuations in a plane perpendicular to the direction of the mean flow.
 Publication:

4th Symposium on Turbulent Shear Flows
 Pub Date:
 1984
 Bibcode:
 1984stsf.proc....3N
 Keywords:

 Computerized Simulation;
 Temporal Distribution;
 Velocity Distribution;
 Viscous Flow;
 Vortices;
 Wall Flow;
 Computational Fluid Dynamics;
 Kinetic Energy;
 NavierStokes Equation;
 Reynolds Stress;
 Turbulent Flow;
 Fluid Mechanics and Heat Transfer