Accession Number:

ADA415043

Title:

Parallel Multigrid DNS/LES Methods for Time-Dependent Compressible Turbulent Flow

Descriptive Note:

Final technical rept. Dec 2000-Mar 2003

Corporate Author:

TEXAS UNIV AT ARLINGTON DEPT OF MATHEMATICS

Personal Author(s):

Report Date:

2003-05-01

Pagination or Media Count:

62.0

Abstract:

During the past two years 1200-303, we have developed a very efficient and reliable direct numerical simulation DNS and large eddy simulation LES software DNSUTA for compressible flow in a curvilinear coordinates which is a continuation of our previous effort supported by AFOSR. The software includes a high-quality grid generation code which can generate smooth and near-orthogonal, body-fitted grids and a parallel efficient flow solver which applies sixth-order compact scheme, eighth-order filter, LU-SGS flow solver, non-reflecting boundary condition, high-order weighted compact scheme for shock capturing, structure function sub-grid model, and MPI parallel computation. The code has been successfully used for prediction of flow transition around flat plate and airfoils with various attack angles. The code has also been used for flow separation control for low Reynolds airfoils with steady and pulsed blowing jets. All of these simulations are real time dependent, 3-D, with general geometry and have demonstrated qualitative or quantitative agreement with experiment or theoretical work. We believe the topics described above are very challenging and our accomplishment is very significant for both basic science and Air Force mission. The high-order weighted compact scheme and non-reflecting boundary conditions in a curvilinear coordinate are the original work conducted by us which is a significant contribution to the CFD community.

Subject Categories:

  • Numerical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE