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Sinusoidal initialisation of initial holdup field.

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Old   December 13, 2011, 09:29
Default Sinusoidal initialisation of initial holdup field.
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Balkrishna Patankar
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Hi,

I am using VOF to simulate a 2d case of bubble rising in a liquid. I wish to initialise the gas holdup field in a sinusoidal manner. Precisely ,
Code:
If y < Y 
alpha =1 

Else 
alpha =0
Is there any way to do this using setFields ?

Thanks,
Balkrishna.
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Old   December 13, 2011, 11:54
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Bernhard
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Using setFields you have the boxToCell method for initialization. Did you try this one?
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Old   December 13, 2011, 14:20
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Yes , but i think that allows one to give only initialisations in the form of quadrilaterals ... thats why the name BOXtoCell . Pls correct me if I am wrong ...
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Old   December 13, 2011, 16:16
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Ok, I misread your pseudocode, but I am quite sure you can do this with funkySetFields of the swak4Foam utility: http://openfoamwiki.net/index.php/Contrib/swak4Foam
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Old   December 13, 2011, 16:51
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Hi Balkrishna

You would also be able to do it with the waves2Foam utility found in

http://openfoamwiki.net/index.php/Contrib/waves2Foam

If you need a sinusoidal interface with a quiescent fluid, then you could initialise the computational domain with a 'stokesFirstStanding' type wave. However, it might be more easily merely to use swak4Foam.

Kind regards,

Niels
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