|October 6, 2010, 18:52||
Non equilibrium wall function : pressure acquisition problem
Join Date: Oct 2009
Posts: 1Rep Power: 0
I'm trying to implement a fluent-type wall function sensitized to pressure gradient, i.e. "non-equilibrium WF". There is no problem in epsilon/omega WF when I get the pressure gradient, needed for my calculation, in this way:
const volScalarField& P = db().lookupObject<volScalarField>("p");
volVectorField grdntP = fvc::grad(P);
If I apply the same procedure in nutSpalartAllmarasWF ( that follows the general Spalding law-of-the-wall but it has to be sentivized to pressure gradient, too!) the solution explode in an unexplainable way. I've already tried to debug my code on every line that I added and I've concluded that the problematic line is the second I wrote before.
My idea is that this procedure applied to nut-WF result in an unintentional modify of the pressure field, but I thin it's a weak idea, if I had understood OF works.
|October 10, 2010, 04:45||
Join Date: Apr 2010
Posts: 28Rep Power: 8
Hi, have you solved this problem?
I am now also trying to write a new wall function including pressure gradient.
|pressure gradient, wall functions|
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