Courant number stopps always my CFD Simulation

Raji · June 10, 2016, 10:56

Hey People,

I have one big problem. I am trying to run a CFD Simulation with pisoFOAM. But itś always the same, that the Simulation stops at the same time while the Courant number is rising. I tried to decrease the time step, but that didn't help much.

I tried to solve the problem by cutting the critical part away. The simulation worked out but another thing showed up. The flow pattern didn't match with the reality. It is making me crazy

. I also tried to refine that critical area but that didn't work, too. Could anyone help me out. That would be awesome.

I assimilate some screenshots from my problem. At the second one you can see in which point the simulation kills itself. Maybe someone have some advise
simu.png

mesh.png

pupo · June 10, 2016, 12:06

may i suggest you post your "controlDict" file together with a log of your simulation ( pisoFoam > log ).

Raji · June 11, 2016, 06:11

Yes that´s true. But I tried that ones before in the same way. That worked.

June 10, 2016, 10:56	Courant number stopps always my CFD Simulation	#1
Raji New Member Saber Join Date: May 2016 Posts: 7 Rep Power: 9	Hey People, I have one big problem. I am trying to run a CFD Simulation with pisoFOAM. But itś always the same, that the Simulation stops at the same time while the Courant number is rising. I tried to decrease the time step, but that didn't help much. I tried to solve the problem by cutting the critical part away. The simulation worked out but another thing showed up. The flow pattern didn't match with the reality. It is making me crazy. I also tried to refine that critical area but that didn't work, too. Could anyone help me out. That would be awesome. I assimilate some screenshots from my problem. At the second one you can see in which point the simulation kills itself. Maybe someone have some advise simu.png mesh.png

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June 10, 2016, 12:06		#2
pupo Member Pedro Join Date: Nov 2014 Posts: 50 Rep Power: 11	may i suggest you post your "controlDict" file together with a log of your simulation ( pisoFoam > log ).

June 11, 2016, 06:11		#3
Raji New Member Saber Join Date: May 2016 Posts: 7 Rep Power: 9	Yes that´s true. But I tried that ones before in the same way. That worked.