Accession Number:

ADA285360

Title:

Structure and Dynamics of Turbulent Wall Layers

Descriptive Note:

Final rept. 1 Mar 1990-31 May 1994

Corporate Author:

ILLINOIS UNIV AT URBANA

Personal Author(s):

Report Date:

1994-06-10

Pagination or Media Count:

11.0

Abstract:

The three-dimensional structure of the turbulent motion of fluid flowing close to a surface has been studied using the technique of linear mean square stochastic estimation to find estimates of the flow field when certain events occur in the flow. The structures given the velocity at one point have been documented, and their dynamic evolution is being studied. It is shown that they are long-lived. One-point events provide insight into the physical bases of closure approximations in one-point moment closures, and they have been used to provide a new closure approximation for the fast pressure-strain correlation. Stochastic estimation is used as a means of defining three-dimensional, dynamic wall boundary conditions for large eddy simulations.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE