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Problem with contact angle

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Old   February 4, 2025, 10:21
Default Problem with contact angle
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Borja DG
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Hi Everyone,

When I initialise a vapour and water field that is meant to have a 50 degree contact angle at the wall it looks as follows (please see attachment). Note that the white line through the gradient is an interpolated interface representation of alpha = 0.5

Now, I am using a constant contact angle BC at the bottom wall, which I understand is based on the gradient of the phase field at the boundary. As I said, I set it to 50, but it looks more like an 80 degree angle (?). This is time 0, and I have checked my initial conditions over and over again. Does anyone have a clue of what that could be?

Note that the line through the rest of the interface is indeed at 50 degrees, the problem only arises when it reaches the bottom wall...

Thanks!
Borja
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File Type: jpg Screenshot 2025-02-04 at 14.11.59.jpg (32.4 KB, 6 views)

Last edited by Borja; February 4, 2025 at 14:09.
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boundary condition, contact angle, initial condition, interfoam

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