CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM (http://www.cfd-online.com/Forums/openfoam/)
-   -   heat transfer boussinesq (http://www.cfd-online.com/Forums/openfoam/93396-heat-transfer-boussinesq.html)

Andrev October 13, 2011 15:02

heat transfer boussinesq
 
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.

nimasam October 15, 2011 09:10

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 ;) )

Andrev October 18, 2011 16:30

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 ?

Thanks for the attention.


All times are GMT -4. The time now is 16:18.