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Modelling sessile droplet sitting on the wall

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Old   June 8, 2020, 07:21
Default Modelling sessile droplet sitting on the wall
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Hello,

I try to model a sessile droplet sitting on the substrate with a initial contact angle e.g. 90 deg in interFoam. I was inspired by the following method:
##########################################
walls
{
type constantAlphaContactAngle;
theta0 90;
limit gradient;
value uniform 0;
}
##########################################
Actually, I tried to put a semi-spherical droplet on the substrate, and the centre of the semi-spherical droplet is just on the surface of the substrate, however, my droplet tends to spread on the surface.

I tried the second approach, I have a spherical droplet just over the surface for a certain distance, and it falls gradually, the droplet first spread over the surface and retrieve. After several time steps, it forms a contact angle of 90 deg finally.

Honestly, in my simulation, I do not need the initial spreading and retrieve process, I just need a sessile droplet with a certain contact angle. Could you please tell me how to do this?

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contact angle, droplet, interfoam

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