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CLSVOF - for capillary rise

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Old   March 28, 2019, 07:39
Default CLSVOF - for capillary rise
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K
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Hey Foamers

I created a CLSVOF solver based on the tutorial from Chalmers : http://www.tfd.chalmers.se/~hani/kur...ankarMenon.pdf
My thought was to use the solver to model a capillary rise, but I have not managed to model it properly.


I used the default case available in openfoam - capillary rise as the starting point to create the case file, I added the boundary condition file for level set function (which I called the PHI_LS).

When I run this model, I get very unrealistic results, - water column drops (instead of rising).


Inorder to ensure that its not anything to do with case files (alpha1, p_rgh and U BC and other solver related stuff), I ran the case with interFoam and it behaves as expected.
So I am guessing CLSVOF method is behaving weirdly becasue of some boundary condition associated with the level set function (PHI_LS).


Can some help me out or point out what I did wrong?
Any help would be greatly appreciated!



BR
Kurian
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File Type: zip CLSVOF_capillaryrise.zip (8.3 KB, 40 views)

Last edited by kuria; April 9, 2019 at 10:24. Reason: Changed the framing of question/problem
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Old   July 28, 2020, 23:27
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John
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Hi kuria, I'm sorry because it has been a while since you posted this. But I also got the same result with this problem that the water column drop instead of rising. Have you figure out what problem happen in this case, or in this solver?. Thank you so much!
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Old   July 30, 2020, 04:56
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Hey John


Unfortunately, I could not figure out what went wrong with the CLSVOF. So I started on working on another way to reduce spurious velocities.
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Old   July 5, 2021, 12:39
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Hi kuria, What kind of method do you use to reduce spurious velocities
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Old   July 12, 2021, 08:40
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Amirhossein Taran
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Hi kurian ,
The model i think you are using , is highly dependent on the mesh uniformity. I mean your mesh needs to have same dx,dy and dz.
make sure you checked this point.
Regards.
Amir
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