Accession Number:

ADA523362

Title:

Optimal LES and a New Near-Wall Model for Application to High-Reynolds-Number Air Foils

Descriptive Note:

Final rept. 1 Dec 2006-30 Nov 2009

Corporate Author:

TEXAS UNIV AT AUSTIN

Personal Author(s):

Report Date:

2010-04-07

Pagination or Media Count:

38.0

Abstract:

Three primary results of research to extend applicability of optimal large eddy simulation OLES to general wall-bounded flows are reported. These are 1 the formulation and testing of theoretically-based OLES, in which theory for multi-point velocity correlations replaces empirical data as input to the model 2 development of anisotropic models of the two-point correlation for use in wall-bounded OLES and, 3 generalization and testing of finite-volume OLES formulations to wall-bounded turbulence. It was found that theoretically-based OLES performs very well. The anisotropy representation was formulated in terms of structure tensors, and this also provided a very good representation of the anisotropy in wall-bounded turbulence. But the approach was judged to be too complex for use with the correlations needed in OLES, and a simpler approach is proposed. Finally, the finite-volume OLES for wall-bounded turbulence resulted in a problem that arises from the treatment of the pressure and incompressibility. A new OLES formulation designed to address this has been developed and is being tested.

Subject Categories:

  • Aerodynamics
  • Aircraft
  • Numerical Mathematics
  • Computer Programming and Software
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE