 |
NASA Technical Reports Server (NTRS) 19980018039: Numerical Procedu... |
 |
by NASA Technical Reports Server (NTRS) |
 |
Thumbnail |
|
Download |
 |
Web page |
|
|
|
Two primitive variable, pressure based, flux-split, |
|
RNS/NS solution procedures for viscous flows are |
|
presented. Both methods are uniformly valid across the |
|
full Mach number range, Le., from the incompressible |
|
limit to high supersonic speeds. The first method is an |
|
'optimized' version of a previously developed global |
|
pressure relaxation RNS procedure. Considerable reduction |
|
in the number of relatively expensive matrix inversion, |
|
and thereby in the computational time, has been achieved |
|
with this procedure. CPU times are reduced by a factor of |
|
15 for predominantly elliptic flows (incompressible and |
|
low subsonic). The second method is a time-marching, |
|
'linearized' convection RNS/NS procedure. The key to the |
|
efficiency of this procedure is the reduction to a single |
|
LU inversion at the inflow cross-plane. The remainder of |
|
the algorithm simply requires back-substitution with this |
|
LU and the corresponding residual vector at any cross- |
|
plane location. This method is not time-consistent, but |
|
has a convective-type CFL stability limitation. Both |
|
formulations are robust and provide accurate solutions |
|
for a variety of internal viscous flows to be provided |
|
herein. |
|
|
|
Date Published: 2016-10-15 02:42:42 |
|
Identifier: NASA_NTRS_Archive_19980018039 |
|
Item Size: 33037553 |
|
Language: english |
|
Media Type: texts |
|
|
|
# Topics |
|
NASA Technical Reports Server (NTRS);... |
|
|
|
# Collections |
|
NASA_NTRS_Archive |
|
additional_collections |
|
|
|
# Uploaded by |
|
@chris85 |
|
|
|
# Similar Items |
|
View similar items |
|
|
|
PHAROS |
|
