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-   -   MRF and Euler model (http://www.cfd-online.com/Forums/openfoam/68065-mrf-euler-model.html)

DropsandSimulations September 4, 2009 11:10

MRF and Euler model
 
Hello,

I want to simulate a stirrer configuration with a continous and a dispersed phase (patricles, bubbles or droplets).
I found an MRFinterFoam configuration in the tutorials but for my case with dispersed particles, I think that the euler model would be best.

Is their an MRFtwoPhaseEulerFoam or any model like this published or how can I create one?

Thanks in advance!

Mark

gwierink September 4, 2009 17:00

Hi Mark,

I am modelling aerated stirred tanks and am trying to get an MRF version of twoPhaseEulerFoam to work. I have a model, but in my case the problem seems to be with the turbulence (since standard twoPhaseEulerFoam does not allow turbulence). I think I will work something out soon and I will post it.

Best regards,

Gijs

PS what are your flow conditions and what is the dispersed volume fraction you're interested in?

DropsandSimulations September 7, 2009 03:25

Hello again,

thanks for writing me. Hi have a stirred tank, but I have a dispersed droplet phase in it. The dispersed volume fraction should be around 0.05 up to 0.15, depending on the flow conditions. The flow conditions are a counter current flow what makes it not easier to calculate :) But all in all, the main conditions will be nearly the same (turbulence model, euler euler and so on). I have made some PIV measurements and calculated the whole thing with FLUENT. But to get away from the commercial software, I want to try it out with OpenFOAM.

Cu

Mark

gwierink September 7, 2009 04:40

Hi Mark,

Well, I'm still working to get MRFTwoPhaseEulerFoam to work and not explode. But in the mean time I found some nice documentation on bubbleFoam here, that probably can be used for your case.

Best regards,

Gijs

DropsandSimulations September 7, 2009 18:09

hello, I got internet .. .yeaahh... I just checked my volume fraction. It is a little bit higher then I mentioned before (around, 0,3 :). The other value was only a test case.

I just took a look at the bubbleFoam Solver. That does not seem too bad. But still no MRF implementation ready... So I think, I have to take a closer look as soon as I am back.

theja October 18, 2011 06:02

MRFInterFoam
 
please if you have any tutorial on MRFInterFoam then please mail it to thejaraju.r@axiomconsult.com

kmooney October 20, 2011 10:56

If you have OpenFOAM-1.6-ext installed you can find a tutorial along with the solver source here:

~/OpenFOAM/OpenFOAM-1.6-ext/tutorials/multiphase/interFoam/MRFInterFoam

I'm not sure if the solver is distributed in non -extend openfoam releases or not however.

theja October 21, 2011 01:18

MRFInterFoam
 
whether mrfinterfoam suits the solving of on room airpurifier or not, if not which solver is better to solve this tyoe problem

gwierink October 21, 2011 02:27

Quote:

Originally Posted by kmooney (Post 328747)
I'm not sure if the solver is distributed in non -extend openfoam releases or not however.

Yep, there are:
$FOAM_TUTORIALS/multiphase/MRFInterFoam
$FOAM_TUTORIALS/multiphase/MRFMultiphaseInterFoam

sharonyue December 20, 2012 11:26

Quote:

Originally Posted by gwierink (Post 228600)
Hi Mark,

I am modelling aerated stirred tanks and am trying to get an MRF version of twoPhaseEulerFoam to work. I have a model, but in my case the problem seems to be with the turbulence (since standard twoPhaseEulerFoam does not allow turbulence). I think I will work something out soon and I will post it.

Best regards,

Gijs

PS what are your flow conditions and what is the dispersed volume fraction you're interested in?

Hi Gijs

Recently I am working on simulating stirred tank , but I failed and being stuck by mesh problem. You can see it here. http://www.cfd-online.com/Forums/ope...tml#post397546
Have you ever simulated you condition successfully?


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