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Forum: OpenFOAM Bugs

September 18, 2011, 13:46

Replies: 15

alphaEqn.H in twoPhaseEulerFoam

Views: 5,394

Posted By alberto

I switched some month ago to 2.0.x, however I did...

I switched some month ago to 2.0.x, however I did all my implementation in 1.7.x, and I do not meet the problem. Anyways, I would suggest to use 2.0.x, which has many improvements :-)

Forum: OpenFOAM Bugs

September 18, 2011, 02:08

Replies: 15

alphaEqn.H in twoPhaseEulerFoam

Views: 5,394

Posted By alberto

The presence of p.storePrevIter() is only there...

The presence of p.storePrevIter() is only there because in OpenFOAM 2.0.x the twoPhaseEulerFoam code uses the PIMPLE algorithm, which allows relaxation of the pressure.

This has nothing to do with...

Forum: OpenFOAM Bugs

September 15, 2011, 22:45

Replies: 15

alphaEqn.H in twoPhaseEulerFoam

Views: 5,394

Posted By alberto

I use OpenFOAM 2.0.x, and tested on the tutorial...

I use OpenFOAM 2.0.x, and tested on the tutorial for twoPhaseEulerFoam called "bed". Maybe you want to test on the same tutorial.

Best,

Forum: OpenFOAM Bugs

September 15, 2011, 21:49

Replies: 15

alphaEqn.H in twoPhaseEulerFoam

Views: 5,394

Posted By alberto

You are welcome :-)

You are welcome :-)

Forum: OpenFOAM Bugs

September 15, 2011, 21:33

Replies: 15

alphaEqn.H in twoPhaseEulerFoam

Views: 5,394

Posted By alberto

Hi, rUaAf is zero only at the first...

Hi,

rUaAf is zero only at the first time-step, since rUaA is initialized to zero. If you look at pEqn.H, you have

rUaAf = fvc::interpolate(rUaA);

I added the Info line in

if...

Forum: OpenFOAM Bugs

September 15, 2011, 11:06

Replies: 15

alphaEqn.H in twoPhaseEulerFoam

Views: 5,394

Posted By alberto

In theory, the presence of the particle pressure...

In theory, the presence of the particle pressure gradient in the momentum equation should enforce the constraint alpha <= alphaMax. This is however a well known source of numerical instability in...

Forum: OpenFOAM Bugs

September 15, 2011, 02:17

Replies: 15

alphaEqn.H in twoPhaseEulerFoam

Views: 5,394

Posted By alberto

The code is correct: the idea behind the...

The code is correct: the idea behind the procedure is to directly include the effect of the particle pressure in the volume fraction equation. You probably noticed that the equation for alpha has an...

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