Passive Scalar OpenFoam (turbulent, steady state velocity field)

f.funk · February 17, 2020, 07:08

Hello, everybody

I want to do a transient scalar Simulation on the basis of a steady state velocity field of T-Pipe. Since there is no scalarTransportFoam for turbulence i changed the the solver and added to the Diffusity DT the turbulent Diffusity.

In C File:

And in the createFields.H:

When i try to run it OpenFoam there is an error which says that it need the laplacian scheme for DT. But since i am not solving laplacian DT in the general equation (C. file) only the DTt (=nut/Sct + DT) i am wondering why ?

Does someone knows about it and could help me ?

Thanks in regards

LuckyTran · February 17, 2020, 11:08

It looks like you have specified the scheme for DT regardless, so why are you getting the error? It doesn't make sense. Maybe post your error.

f.funk · February 18, 2020, 08:03

Thanks LuckyTran for the quick reply. I found the mistake: every time you change the solver you have to implement it again with (wclean, wmake ...). If you dont do that OpenFoam will use the last Scripts. In my case where DT was still in the general equation.

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February 17, 2020, 11:08		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 66	It looks like you have specified the scheme for DT regardless, so why are you getting the error? It doesn't make sense. Maybe post your error.

February 18, 2020, 08:03		#3
f.funk New Member F. Funk Join Date: Feb 2020 Posts: 2 Rep Power: 0	Thanks LuckyTran for the quick reply. I found the mistake: every time you change the solver you have to implement it again with (wclean, wmake ...). If you dont do that OpenFoam will use the last Scripts. In my case where DT was still in the general equation.