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-   -   Searching for the thermal energy equation (http://www.cfd-online.com/Forums/openfoam-solving/63887-searching-thermal-energy-equation.html)

harly April 22, 2009 20:22

Searching for the thermal energy equation
 
Hi,

I am looking for the thermal energy equation in OF and so far I was not able to find the right file. I assume that it has to be somewhere in the buoyantFOAM solver tree is that right?

Please give me a hint :)

- harly

mixer April 22, 2009 23:58

you are right...i think it gets mentioned in line 73 of buoyantfoam.C

# include heqn.h

the code is described here:

http://foam.sourceforge.net/doc/Doxy...8H-source.html,

00001 {
00002 fvScalarMatrix hEqn
00003 (
00004 fvm::ddt(rho, h)
00005 + fvm::div(phi, h)
00006 - fvm::laplacian(turbulence->alphaEff(), h)
00007 ==
00008 dpdt
00009 + fvc::div(phi/fvc::interpolate(rho)*fvc::interpolate(p))
00010 - p*fvc::div(phi/fvc::interpolate(rho))
00011 );
00012
00013 hEqn.relax();
00014 hEqn.solve();
00015
00016 thermo->correct();
00017 }

harly April 23, 2009 17:53

Thanks a lot - somewhat I went over these equation, because the one I am looking for was supposed to look different.

Is there a difference in Thermal energy equation and thermal diffusion equation ?

I would have expected, that the velocity would be in the equations - it should have a similar structure than the energy equation itself, but with the thermal energy, which I guess is h (enthalpy) because it is h(T) - right ?

I am confused - can someone help out ?

- harly


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