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Cristiano July 9, 2010 09:47

fireFOAM convergence
Hello everyone,

I have run my simulation 1 week ago. I do not understand the reason for which it takes me a long time.
My grid counts around 12000 cells and I think I have set the parameters in controlDict file properly.

Any advice?


marcbest July 9, 2010 10:14

hi christiano,

i think it depends - amongst others - on your computer (clock rate and RAM), the deltaT and endTime in your controlDict and the number of species...

i hope this helps, otherwise you should describe your problem more detailled...

regards and have a nice weekend

Cristiano July 9, 2010 10:55

fireFoam convergence
I have run my case (Jet in Hot Coflow) in parallel on two processors. I have got a non confined jet with three different inlets:
air (N2, O2);
hot combustion products (N2, O2, CO2, H2O);
fuel (CH4).

I have checked each parameters in controlDict file and everything should be OK.

deltaT=0.0001 (based on the Courant number)

What piece of information do you need to understand my problem?

Thank You again.


marcbest July 9, 2010 11:35

so i don't really know, are the residuals still too high? perhaps somthing is wrong in the case and the residuals are oscillating...
has someone else an idea?

Cristiano July 9, 2010 11:47

fireFoam convergence
I have noticed physical time are not changing during the run. It has been the same for days.
I can read deltaT = 1e-17. For this reason, I should have really high velocity in some point of the domain.


babakflame May 22, 2013 07:21

Dear Buddies
I want to use fireFoam for simulating DLR flame (Fuel: CH4-H2-N2 and Oxidizer: air); I think I have set my case in proper state; However, After running my case it seems that the jets are still in cold situation and the combustion did not started :confused::confused::confused:; Would some body please hint me what is the problem? I can upload the necessary files i.e. combustion, chemistry, reaction or anythng else:)


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