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Old   July 9, 2010, 09:47
Default fireFOAM convergence
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Cristiano
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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?

Cristiano
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Old   July 9, 2010, 10:14
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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
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Old   July 9, 2010, 10:55
Default fireFoam convergence
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Cristiano
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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)
maxCo=0.1
maxDeltaT=0.001

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

Thank You again.

Cristiano
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Old   July 9, 2010, 11:35
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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?
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Old   July 9, 2010, 11:47
Default fireFoam convergence
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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.

???
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Old   May 22, 2013, 07:21
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Dear Buddies
Hi
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 ; Would some body please hint me what is the problem? I can upload the necessary files i.e. combustion, chemistry, reaction or anythng else

Regards
Bobi
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