Accession Number:

ADA175285

Title:

Studies of Shear Flows.

Descriptive Note:

Final rept. Jan 84-Dec 85,

Corporate Author:

STANFORD UNIV CA DEPT OF MECHANICAL ENGINEERING

Report Date:

1986-03-15

Pagination or Media Count:

25.0

Abstract:

The objective of the work reported is construction of zonal models for accurate prediction of turbulent flows in rapid-running computer programs. The work follows the ideas set down in the discussion of zonal modeling by S. J. Kline in Vol. II of the Proceedings of the 1980-81 AFOSR-Stanford Conference on Complex Turbulent Flows. This discussion noted that the fast-running models available lack sufficient span to predict all classes of turbulent flows of engineering importance in a standard, invariant form. It therefore suggested that the models be treated as zonal. In the zonal approach, the constants in th models are adjusted for each important zone of the flow, where the word zone implies a region with a particular type of flow physics. In the proposal for the work, it was also noted that the parametrization of the flows and the selection of appropriate constants would ultimately need to be guided by the domain over which accurate results could be obtained, and that might well be different from pre-conceptions embodied in conventional taxonomies of the flows.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE