raul.raghav
Subscriber

I'm quite confident that something has gone wrong in the setting up of the Second-Order Upwind case for 10cP droplet viscosity (look at the image below). Your droplet spreads well at both 0.65cP and 5cP viscosity values, and then for the 10cP value, it seems like the droplet is approaching the obstruction at a significantly lower velocity compared to the other cases and encapsulates the obstruction. Something doesn't sound right here and I'm sure it has to do with the setup.



QUICK provides a better accuracy on quadrilateral and hexahedral (structured) meshes and by default it applies the Second-Order Upwind scheme on unstructured meshes. Refer: Spatial Discretization and Other Discretization Schemes.