Accession Number:

ADA440414

Title:

Dynamically Resolved Simulation of Atmospheric Features and Turbulence Using Advanced Models and Adaptive Algorithms

Descriptive Note:

Scientific rept. no. 1, 17 Jun 2004-16 Feb 2005

Corporate Author:

NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Report Date:

2005-02-16

Pagination or Media Count:

22.0

Abstract:

Development of the North Carolina State University NCSU adaptive high-resolution atmospheric model and the atmospheric version of the NCSU k-zeta turbulence model continued during this contract period. The boundary condition implementation at the lateral boundaries was changed to radiative type to better preserve fixed condition boundary values. A sponge layer condition was installed at the upper boundary. The solution redistribution algorithm after mesh adaptation was changed to a weighted essentially non-oscillatory algorithms in order to improve accuracy. Basic development of the turbulence model was completed and the equations are included herein. The full turbulence model was included in the code and 3-D runs were initiated to begin comparison with observation and other codes. A widely used generic 2-D windstorm case was used for confirmation and verification of the changes. initial results demonstrated the breakdown of shear layers into clear air turbulence of sufficient severity to produce 1-g vertical accelerations for aircraft.

Subject Categories:

  • Aircraft
  • Atmospheric Physics
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE