Wrong pressure output. Correct BC for U and p?

pizzaspinate · February 19, 2015, 03:12

Hi FOAMers,

I try to simulate a wing flying in the air using potentialFoam (I assume I have to use it if I want to run a simple Euler run?!). I did have a look at the tutorials for the motorbike and 2dmoving wing in order to get the BCs right.
However I am still not entirely sure about the BCs (see attachment) in the 0/p and 0/U file as the results I am getting are funny. Especially for p which ranges from 0 to 1e-16.

Hope someone can help me out.

Svensen · February 20, 2015, 03:54

potentialFoam doesn't change the pressure.
"p which ranges from 0 to 1e-16" - it's simply ParaView try to make a map with some range for you, that's why it give you another value for pressure like 1e-16.
the task of potentialFoam is to define the internal field for velocity. So if you see the results of the potentialFoam you can find that you have now a non-uniform internal field with a lot of values inside

pizzaspinate · February 23, 2015, 09:34

thank you very much for your help! I ran it with k-omega now and I get proper results!

February 20, 2015, 03:54		#2
Svensen Senior Member Join Date: Jan 2015 Posts: 150 Rep Power: 11	potentialFoam doesn't change the pressure. "p which ranges from 0 to 1e-16" - it's simply ParaView try to make a map with some range for you, that's why it give you another value for pressure like 1e-16. the task of potentialFoam is to define the internal field for velocity. So if you see the results of the potentialFoam you can find that you have now a non-uniform internal field with a lot of values inside paka and sharonyue like this.

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February 23, 2015, 09:34		#3
pizzaspinate Member Join Date: Dec 2012 Posts: 81 Rep Power: 13	thank you very much for your help! I ran it with k-omega now and I get proper results!