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Search took 0.00 seconds. Search: Posts Made By: vonboett
Forum: OpenFOAM Programming & Development April 29, 2018, 05:31
Replies: 28
Views: 7,646
Posted By vonboett
Hi, Interesting version you found there,...

Hi,

Interesting version you found there, where I experimented with eddy diffusivity... However, the code I ment is in the supplement of
https://www.geosci-model-dev.net/10/3963/2017/
and it is...
Forum: OpenFOAM Programming & Development April 11, 2018, 04:55
Replies: 28
Views: 7,646
Posted By vonboett
have you tried interPhaseChangeFoam?

have you tried interPhaseChangeFoam?
Forum: OpenFOAM Programming & Development April 5, 2018, 10:56
Replies: 28
Views: 7,646
Posted By vonboett
one note though: interMixingFoam is either...

one note though: interMixingFoam is either keeping the overall mass right but allows negative concentrations or volumetric concentrations greater than one, or you have the concentrations limited to...
Forum: OpenFOAM Programming & Development April 5, 2018, 10:52
Replies: 28
Views: 7,646
Posted By vonboett
Yes, I would use D23 = D32 = 0 to block the...

Yes, I would use D23 = D32 = 0 to block the diffusivity between the two miscible phases. InterMixingFoam uses the Volume-Of-Fluid method, where it keeps one phase unmixed, while a second phase can...
Forum: OpenFOAM Programming & Development April 5, 2018, 02:46
Replies: 28
Views: 7,646
Posted By vonboett
It is the diffusion constant that causes phase 2...

It is the diffusion constant that causes phase 2 to mix with phase 3 and phase 3 with phase 2. To my understanding, D23 should be equal to D32 to make sense.
Anyway, since there is no drift flux or...
Forum: OpenFOAM Programming & Development June 17, 2014, 05:38
Replies: 28
Views: 7,646
Posted By vonboett
Hi Zhang, yes it calls UEqn.H from...

Hi Zhang,

yes it calls UEqn.H from interFoam, thats OK since one solves only one phase-averaged Navier-Stokes equation neglecting drag between phases. I would like to know who maintains this...
Forum: OpenFOAM Programming & Development February 6, 2014, 07:44
Replies: 28
Views: 7,646
Posted By vonboett
Well I make a threshold for alpha1 (non-mixing...

Well I make a threshold for alpha1 (non-mixing phase) from 0 (or maybe -0.0001) to 0.5 and color it by alpha2, then I take a threshold of this threshold for alpha3 (full range from min to max) and...
Forum: OpenFOAM Programming & Development September 26, 2013, 05:11
Replies: 28
Views: 7,646
Posted By vonboett
Well, it works by now conserving the mass of the...

Well, it works by now conserving the mass of the two liquids and keeping their concentrations bound between 0 and 1. But I had to introduce a solving step for the air phase. Will post the code here...
Forum: OpenFOAM Programming & Development July 2, 2013, 03:26
Replies: 28
Views: 7,646
Posted By vonboett
Ok, in larger scale and longer runs, alpha2 and...

Ok, in larger scale and longer runs, alpha2 and alpha3 diffuse into alpha1 when applying diffudive terms, and the massbalance (due to bounding?) is not quite right yet in the suggestion above because...
Forum: OpenFOAM Programming & Development June 26, 2013, 05:29
Replies: 28
Views: 7,646
Posted By vonboett
improved interMixingFoam in respect to mixing

So here is my adjusted alphaEqns.H and createFields.H with the following features:

-the two liquids are solved for and alpha1 is derived from 1 - alpha2 - alpha3

-the diffusive flux is added by...
Forum: OpenFOAM Programming & Development June 4, 2013, 10:46
Replies: 28
Views: 7,646
Posted By vonboett
...and by the way, maybe someone could shed some...

...and by the way, maybe someone could shed some light on:

// Add the diffusive flux for alpha3->alpha2
phiAlpha2 -= fvc::interpolate(Dc32)*mesh.magSf()*fvc::snGrad(alpha3);
...
Forum: OpenFOAM Programming & Development May 24, 2013, 09:12
Replies: 28
Views: 7,646
Posted By vonboett
bug in interMixingFoam?

Any news? I wonder about the same thing. Simulating channel flow with the three phases, alpha3 seems to dissolve slowly into alpha1 while alpha2 stays niceley seperated from alpha1 as it should! If...
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