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Search: Posts Made By: GerhardHolzinger
Forum: OpenFOAM Running, Solving & CFD November 7, 2012, 07:52
Replies: 15
Views: 2,765
Posted By GerhardHolzinger
The bubble size when air is injected into water...

The bubble size when air is injected into water depends on how you inject it. In my experiment air enters through a porous plate. Therefore, the bubbles are relatively fine. If air enters through a...
Forum: OpenFOAM Running, Solving & CFD November 7, 2012, 05:25
Replies: 15
Views: 2,765
Posted By GerhardHolzinger
What I meant with "There are no bubbles" is, that...

What I meant with "There are no bubbles" is, that you don't see any bubbles when you look on your results in paraView.

I attached some pictures. Two of them are from paraView, showing the same...
Forum: OpenFOAM Running, Solving & CFD November 7, 2012, 04:28
Replies: 15
Views: 2,765
Posted By GerhardHolzinger
I think Alberto meant, the difference between an...

I think Alberto meant, the difference between an Euler-Euler and a VOF-approach.

In Euler-Euler all phases are distributed. You do not calculate single bubbles but a gaseous phase.
So when...
Forum: OpenFOAM Running, Solving & CFD November 5, 2012, 04:11
Replies: 15
Views: 2,765
Posted By GerhardHolzinger
Did you add the equation I mentioned? In...

Did you add the equation I mentioned?

In OpenFOAM 2.1.x (some time after 2.1.1 came out) the two-phase solvers were adapted to use MULES. Now there is no problem with free water surfaces.
Forum: OpenFOAM Running, Solving & CFD July 3, 2012, 03:28
Replies: 15
Views: 2,765
Posted By GerhardHolzinger
update

I did some reading and found this in H. Rusches thesis on page 116. There he discusses ways to solve the phase continuity equation.

On page 116 he discusses an approach by Spalding. It is about...
Forum: OpenFOAM Running, Solving & CFD July 2, 2012, 08:06
Replies: 15
Views: 2,765
Posted By GerhardHolzinger
twoPhaseEulerFoam unphysical behaviour

Hello,

I am trying to simulate a bubble column. My domain is a simple box, partly filled with water.
At the center of a small patch on the bottom air is injected (alpha = 1, Ua = 0.12). Water...
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