Thanks for your collaboration!


Why the contact angle ( or better to say slope of the interface) change  during the motion of the interface for the constant static value while it is mentioned in Fluent theory guide that the slope in the first cell is set according to the prescribe contact angle?

*** In this regard I checked the slope of interface in the first cell adjacent to the wall for different vof iso-value surfaces. 


Can we say the change in the slope of the interface in first cell is due to numerical errors  such as diffusion?


Why people use the contact angle as a criteria for validation while they prescribed the dynamic contact angle in advance?