The Interior Wetted Wall feature is available on interior boundaries. It is similar to the Wetted Wall condition except that it applies on both sides of an interior boundary and introduces a discontinuity of the phase field variables across the boundary. This node can be used to avoid meshing thin structures.

Along an interior wetted wall the contact angle for the fluid, θw, is specified on both sides of the boundary, and across it, the mass flow is zero.

Enter a value or expression for the Contact angle θw. The default value is π/2 rad.