Accession Number : ADA182250

Title :   Improved Numerical Prediction of Transonic Flow.

Descriptive Note : Technical rept.,

Corporate Author : ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Sahu,Jubaraj ; Nietubicz,Charles J.

Report Date : MAR 1987

Pagination or Media Count : 34

Abstract : The time dependent Navier Stokes computational technique has been in general use to predict transonic flows over projectiles. Recently, efforts have been made to improve the computational efficiency of this code by analyzing and including a spatially varying time step and various improved artificial dissipation models. The combined effect of these changes has led to a significant gain in the robustness and convergence characteristics for steady state applications. These techniques have been used to compute the practical problem of flow over a projectile at a transonic speed. The results confirm the improvements achieved for such calculations. Keywords: Steady state; Transonic flow; Varying time step; Navier Stokes equations; Dissipation models.

Descriptors :   *TRANSONIC FLOW, COMPUTATIONS, EFFICIENCY, DISSIPATION, MATHEMATICAL PREDICTION, NUMERICAL ANALYSIS, STEADY STATE, TRANSONIC CHARACTERISTICS, CONVERGENCE, NAVIER STOKES EQUATIONS, FLOW, PROJECTILES, TIME, VARIABLES

Subject Categories : Fluid Mechanics
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE