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Old   October 13, 2011, 15:02
Default heat transfer boussinesq
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Dear Foam s,
please

can anyone tell me how can I set a fixed heat flux on a wall using buoyantBoussinesqPimpleFoam?

On the temperature file (T and T.org), if I set temperature as a fixedGradient, does it works?

like grad (T) = qflux / k.


Thanks for the attention.
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Old   October 15, 2011, 09:10
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it depends ur k is fixed or not
1) if your k is fixed so use the fix Gradient for temperature

2) if your k is variable and change during simulation use groovyBC, to read k in each simulation and divide it into fixed qflux. (you can find in froum more )
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Old   October 18, 2011, 16:30
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Thanks for the help.

I'm having problems with the time step of my case,
when I set a fixedGradient to define heat flux ( k constant), if I increase the time step on controlDict, the results change too: temperature increases...

Anyone know what am I doing wrong ?

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