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-   -   Need a solver for a trans-sonic simulation (http://www.cfd-online.com/Forums/openfoam/117778-need-solver-trans-sonic-simulation.html)

Spaceprofessor May 15, 2013 03:52

Need a solver for a trans-sonic simulation
 
Hi All,

I have been running a simulation of a land speed vehicle at several differents speeds using sonicFoam. This works very well, until the Mach number is less than 1 (ie: subsonic). I have tried rhoSimpleFoam and rhoCentralFoam and they do not give me results either.

Can anyone suggest a solver that I can use for mach numbers between 0.8 and 1?

I have no mesh motion if this helps.

Thanks in advance!!

niklas May 15, 2013 04:45

Quote:

Originally Posted by Spaceprofessor (Post 427638)
Hi All,

I have been running a simulation of a land speed vehicle at several differents speeds using sonicFoam. This works very well, until the Mach number is less than 1 (ie: subsonic). I have tried rhoSimpleFoam and rhoCentralFoam and they do not give me results either.

regardless of the transonic switch?

Spaceprofessor May 15, 2013 05:16

Quote:

Originally Posted by niklas (Post 427656)
regardless of the transonic switch?

Sorry, I do not understand what you mean?

I won't be using this solver above Mach 1.

niklas May 15, 2013 06:22

Quote:

Originally Posted by Spaceprofessor (Post 427662)
Sorry, I do not understand what you mean?

I won't be using this solver above Mach 1.

In the SIMPLE dictionary in fvSolution
you can set

transonic on;
or
transonic off;
If you dont specify it, it is set to off by default and that is what you have been using, but Im just wondering
if it will work better if you set it to on...even if you run subsonic, you might not be subsonic
in the iterations leading up there.

niklas May 15, 2013 06:24

btw, this is just for the rhoSimpleFoam solver


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