Forum: OpenFOAM Running, Solving & CFD
January 7, 2012, 04:03
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Replies: 48
Views: 18,150
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Forum: OpenFOAM Running, Solving & CFD
January 30, 2011, 05:10
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Replies: 48
Views: 18,150
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Forum: OpenFOAM Running, Solving & CFD
March 3, 2010, 16:11
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Replies: 48
Views: 18,150
Oh, this has been far in the past.
I was...
Oh, this has been far in the past.
I was stumbling about your question just today.
Unfortunately I can't fetch the file for myself and I have lost it due to some system error ...
Can anyone post...
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Forum: OpenFOAM Running, Solving & CFD
July 6, 2009, 09:05
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Replies: 48
Views: 18,150
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Forum: OpenFOAM Running, Solving & CFD
June 4, 2008, 13:54
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Replies: 48
Views: 18,150
Update on the case.
The veloc
Update on the case.
The velocity gradient mentioned above was due to boundary influence.
With a slightly bigger geometry the result is within 1.4 % error of the estimated value of the...
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Forum: OpenFOAM Running, Solving & CFD
June 3, 2008, 13:51
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Replies: 48
Views: 18,150
Hello again.
I revised the
Hello again.
I revised the whole case of the rising bubble.
My first setup was complete crap!
I did completely wrong trying to compute in plane 2D.
Now I did a calculation on a...
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Forum: OpenFOAM Running, Solving & CFD
May 29, 2008, 14:38
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Replies: 48
Views: 18,150
Dam it, this is not working.
Dam it, this is not working.
I have tried different set-ups now, but this is still not working.
The test case with a 20mm diameter bubble described in the literature yields 20% error.
...
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Forum: OpenFOAM Running, Solving & CFD
May 28, 2008, 13:33
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Replies: 48
Views: 18,150
Well, thats a lot of work.
Bu
Well, thats a lot of work.
But maybe I will try it.
Now, that the caluclation is finished I have some depressing results. The bubble broke up just about the end of the calculation:
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Forum: OpenFOAM Running, Solving & CFD
May 28, 2008, 11:24
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Replies: 48
Views: 18,150
Yes, I'm talking about the cur
Yes, I'm talking about the curvation of the top front of the bubble.
I don't know how to export these things into MATLAB or similar.
Does anybody know, how this can be done?
Meanwhile...
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Forum: OpenFOAM Running, Solving & CFD
May 28, 2008, 02:28
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Replies: 48
Views: 18,150
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Forum: OpenFOAM Running, Solving & CFD
May 26, 2008, 13:50
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Replies: 48
Views: 18,150
Hello.
I received a questio
Hello.
I received a question about how I calculated the terminal velocity.
I have used a post-processing tool I got from the university. I don't know in detail where it comes from, but it...
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Forum: OpenFOAM Running, Solving & CFD
May 25, 2008, 19:00
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Replies: 48
Views: 18,150
Now I could performe a full si
Now I could performe a full simulation.
The terminal velocity is reached without significant "overshot".
Have a look:
http://www.cfd-online.com/OpenFOAM_Discus/icons/mime_pdf.gif...
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Forum: OpenFOAM Running, Solving & CFD
May 23, 2008, 06:51
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Replies: 48
Views: 18,150
The bubble split up ...
htt
The bubble split up ...
http://www.cfd-online.com/OpenFOAM_Discus/messages/1/7796.png
Looks like a smilie to me http://www.cfd-online.com/OpenFOAM_Discus/clipart/happy.gif
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Forum: OpenFOAM Running, Solving & CFD
May 23, 2008, 06:40
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Replies: 48
Views: 18,150
I have set up a finer mesh by
I have set up a finer mesh by now and the simulation is running.
The error between estimated and calculated liquid phase volume fraction is at 0.9 %.
So I think the mesh is "good" enough.
I...
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Forum: OpenFOAM Running, Solving & CFD
May 23, 2008, 05:08
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Replies: 48
Views: 18,150
I had a look into the PhD Thes
I had a look into the PhD Thesis.
It's consistent with the other theoretical works I have read.
What I'm still missing is a way of calculating the rise-velocity.
The OpenFOAM-PostProcessing...
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Forum: OpenFOAM Running, Solving & CFD
May 22, 2008, 04:42
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Replies: 48
Views: 18,150
Dear Hrv.
The complete setu
Dear Hrv.
The complete setup is described in http://test.interface.free.fr/Case01.pdf
So, I used a spherical bubble of 0.02m diameter.
An I have just downloaded the PhD from Henrik...
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Forum: OpenFOAM Running, Solving & CFD
May 22, 2008, 01:38
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Replies: 48
Views: 18,150
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Forum: OpenFOAM Running, Solving & CFD
May 22, 2008, 01:36
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Replies: 48
Views: 18,150
Ok, of course I have chosen th
Ok, of course I have chosen the wrong transportProperties, and size of the initial bubble. Thats why the bubble was rising too slow and getting "out of shape".
So, now that I did a check on all...
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Forum: OpenFOAM Running, Solving & CFD
May 21, 2008, 11:07
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Replies: 48
Views: 18,150
My first setup was really bad.
My first setup was really bad.
I have done this now:
- used the complete computational domain (no symmetry)
- boundary-condition:
U: 0 at the bottom, zeroGradient at all other sides
...
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Forum: OpenFOAM Running, Solving & CFD
May 20, 2008, 09:20
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Replies: 48
Views: 18,150
Hello.
Now I'm getting to m
Hello.
Now I'm getting to my next problem:
The rise of sperical bubble to it's terminal velocity.
I used the test-setup described in http://test.interface.free.fr/Case01.pdf
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