CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Running, Solving & CFD (http://www.cfd-online.com/Forums/openfoam-solving/)
-   -   Oscillations rhoSonicFoam with realgas effects (http://www.cfd-online.com/Forums/openfoam-solving/59946-oscillations-rhosonicfoam-realgas-effects.html)

abhishek November 3, 2006 07:36

Hi all I am trying to run r
 
Hi all

I am trying to run rhoSonicFoam with real gas effects. I have tried to extend the application of rhoSonicFoam to real gases.

I tried the shock tube test case with the discontinuity in between the domain.
Initial conditions are

UL=0 UR= - 428
pL=131820 PR=36679
TL=TR=389
Left boundary condition is wall
right boundary condition is pressure based
zero gradient for other quantites
constant gas mixture of H2: O2:AR::1:2:7
time step is 1e-8

after running this test case i am getting oscillations in temperature,pressure and density behind the shock wave through the solution itself seems to be correct ie the postion of shock.
IF we replace with UR=0 as initial conditions the oscillations are not seen.
I have tried with saveral interpolation schemses and other combinations.

Can anyone comment on this.


All times are GMT -4. The time now is 04:15.