|August 17, 2007, 01:38||
Nondimensionalization of variables in comp. flow
Hello! I am solving numerous compressible multi-fluid flow. In fact, the code was based on the ghost fluid method and the stiffened EOS was chosen to describe the fluid motion for both.
p=(gamma-1)*rho*I-gamma*PI where gamma=1.4 and PI=0 for gas and 5.5 and 4.9E6 for water.
Due to such large values, my code has suffered from the instability. However, when I solved a similar problem nondimensionalized, code worked excellently.
Can anyone explain about the performance or effectiveness of the nondimensionalized one and how to do it?
For example, density = 1200kg/m^3 velocity = 10 m/s pressure = 10GPa
And I also wonder that the gamma in the EOS is usually constant without any dimension so that it doesn't need to be nondimensionalized.
Thanks in advance.
|Thread||Thread Starter||Forum||Replies||Last Post|
|flow over a cylinder urgent!||kevin||FLUENT||8||August 11, 2015 13:00|
|Fully Developed Flow in Star-cd||SMM||STAR-CD||0||September 5, 2011 22:08|
|Mass flow and U-Mom flow in CFX||Zhihua Xie||CFX||0||September 3, 2007 09:49|
|reversed flow at velocity inlet / mass flow inlet||ib||FLUENT||1||March 26, 2007 13:11|
|transform navier-stokes eq. to euler-eq.||pxyz||Main CFD Forum||37||July 7, 2006 08:42|