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Moving contact line in OpenFOAM

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Old   October 18, 2019, 09:56
Default Moving contact line in OpenFOAM
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Hi everyone,

I'm trying to understand how OpenFOAM, and interFoam in particular, deals with a moving contact line, e. g. a drop spreading over a surface. I've seen how the contact angle is imposed calculating the interface normal vector in the interfaceProperties.C file, but I haven't been able to find how OpenFOAM "makes the magic". I thought that maybe it would apply some external force, but in the UEqn.H file there is nothing like that.

I'm starting to think that it would be related to the surface tension force, but I'm not sure. I hope you can help me to figure this out.

Regards,

Adolfo
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Old   October 21, 2019, 10:06
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Hi dolfus,
As I know there are to two numerical method to simulate moving contact line in Navier Stokes equations: 1. Modify the slip velocity by the contact line velocity. 2. Add the external force to surface tension tension force at the vicinity of the contact line. You can read this article "VOF simulations of the contact angle dynamics during the drop spreading: Standard models and a new wetting force model" for the 2nd method.
I do not use OpenFOAM for moving contact line model so I can not help you this part.
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Old   October 22, 2019, 04:58
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Thank you for your reply. I know about this paper but the point is that I haven't been able to find anything like that inside the OpenFOAM code, probably because I haven't looked at the right files yet.


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