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Simulation of dispersion of oil droplets in water -two issues

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Old   November 15, 2012, 12:06
Default Simulation of dispersion of oil droplets in water -two issues
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Milan
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Hello

I am working with modeling of multiphase flow using cfx, specifically dispersion of oil droplets in water flowing through a pipe. The dispersion presents experimentally different droplet diameters.
To model the issue I will use a eulerian eulerian approach with the particle model using two alternatives:
- the water as a continuous phase and the oil as four independent dispersed phases with different diameters.
-Use the inhomogeneous MUSIG model.

- For the first alternative i am getting an error after trying to start the simulation in the solver manager. The error is the following:
Error in subroutine FNDVAR :
Error finding variable ROTVEL
GETVAR originally called by subroutine get_DOMVEL
+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine GV_ERROR |

Do you know what might be causing it?

- for the second alternative, the inhomogeneous MUSIG model is not available as an option when i select the oil as a polydispersed phase, only the homogeneous MUSIG appears. Why is that? Is there maybe a license limitation for the academic version in my university?

Thanks for all the possible help you can provide

Milan
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Old   November 15, 2012, 18:00
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Glenn Horrocks
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The error message is cryptic, but appears to be looking for (and not finding) a variable associated with domain motion. Is this a rotating frame of reference simulation? Or are you using the translating domain beta feature?
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Old   November 15, 2012, 18:21
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Hello Glenn

No, no movement at all. The domain is a simple pipe with inlet and opening. I scaled the mesh though because the diameter had to be smaller than how it was originally constructed.

I ran the same case with only one particle size and it runs ok.

Cheers

Milan
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Old   November 15, 2012, 18:23
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It appears to be looking for domain rotation information and not finding it. Check whether the domain has been set to rotating or some other mistake like that.
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Old   November 16, 2012, 08:50
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Hello

The problem is caused by insufficient available memory to run the simulation. First issue solved.

Thanks

Milan
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Old   July 24, 2013, 03:33
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Answer to the second issue:

To activate the inhomogeneous MUSIG model (CFX 13.0) you have to "Enable Beta Features" in the CFX-Pre Options Menu, under the category: "General".

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musig, oil water flow, solver error

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