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Forum: OpenFOAM Running, Solving & CFD May 29, 2017, 04:45
Replies: 82
Views: 50,292
Posted By zarox
Hi Elyas, For incompressible flow...

Hi Elyas,


For incompressible flow divergence of the stress tensor is only the Laplacian of the velocity, for Stoke hypothesis with Newtonian fluids

\nabla . \tau = \nu \Delta \bf {u}

The...
Forum: OpenFOAM Running, Solving & CFD March 7, 2017, 02:14
Replies: 82
Views: 50,292
Posted By zarox
Hi, I use qtcreator in order to explore the...

Hi,

I use qtcreator in order to explore the code, you would be able to find source code for each piece. On your OpenFoam folder type qmake -project *, this would create a .pro file to be open with...
Forum: OpenFOAM Running, Solving & CFD February 28, 2017, 03:25
Replies: 82
Views: 50,292
Posted By zarox
Dear Tobi, I don't get all about the...

Dear Tobi,


I don't get all about the stabilization term, how it's work with the LU decomposition and so on. I used to work on a Poisson solver with BiCGStab and Multigrid solver and so on,...
Forum: OpenFOAM Running, Solving & CFD February 27, 2017, 11:05
Replies: 82
Views: 50,292
Posted By zarox
Hi Tobi, Thank you for your clear check....

Hi Tobi,

Thank you for your clear check. You probably have rigth about the "stabilization" term. I don't get all, but I suppose your guess is a good one.


Thank you. Sorry, again, for the...
Forum: OpenFOAM Running, Solving & CFD February 24, 2017, 02:15
Replies: 82
Views: 50,292
Posted By zarox
Tobi, It is Bad that now we are stuck in this...

Tobi,
It is Bad that now we are stuck in this reproach things. I apologize if I offend you. I get the need to have clear syntaxe for equation. I am totally agree with you. Can we start again, and if...
Forum: OpenFOAM Running, Solving & CFD February 23, 2017, 14:41
Replies: 82
Views: 50,292
Posted By zarox
Hi, Sorry for the bold, I spent a couple of...

Hi,
Sorry for the bold, I spent a couple of hours to get the tricks so I wanted to share. It seems to me that you mistake between dev or dev2 and the stress tensor. I didn't read your book but I...
Forum: OpenFOAM Running, Solving & CFD February 23, 2017, 14:31
Replies: 82
Views: 50,292
Posted By zarox
Hi, Sorry for the bold, I spent a couple of...

Hi,
Sorry for the bold, I spent a couple of hours to get the tricks so I wanted to share. It seems to me that you mistake between dev or dev2 and the stress tensor. I didn't read your book but I...
Forum: OpenFOAM Running, Solving & CFD February 23, 2017, 08:10
Replies: 82
Views: 50,292
Posted By zarox
div((nuEff*dev2(T(grad(U))))) is undefined in dictionary

I think, the last equation is correct but I didn't explain the Background correctly.

My simple calculation is for the stress Tensor, with stokes hypothesis:

\tau = \nu (\nabla u +(\nabla...
Forum: OpenFOAM Running, Solving & CFD February 23, 2017, 05:41
Replies: 82
Views: 50,292
Posted By zarox
divDevRhoReff in OpenFOAM4.x

Dear all,

Thank you for the Explanation Tobias. I have been immersed in the Topic with the OpenFOAM4.x that with OpenFOAM3.x Change the Turbulence model Code structure. Before we had dev Operator...
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