[HWilliams79]

I am hoping to simulate a two-phase flow where a sphere starts suspended at a certain height and then falls under the influence of gravity only and impacts on a body of liquid in the presence of ambient gas above the free surface of the liquid. (So effectively the sphere first falls through air and then enters a body of liquid).

This involves wetting phenomena where after impact the liquid rises up around the sphere, is this something that can be modelled in STAR CCM?

[cwl]

Yes, you'll need VOF (Volume of Fluid) multiphase model (for air and water), Overset Mesh (for moving part) and DFBI model (Dynamic Fluid-Body Interaction) for .. fluid-body interaction %)

[HWilliams79]

To avoid having a moving part might it be possible to instead have a static sphere and then a multiphase flow where the fluid part moves towards the sphere?

[HWilliams79]

Originally Posted by cwl

Yes, you'll need VOF (Volume of Fluid) multiphase model (for air and water), Overset Mesh (for moving part) and DFBI model (Dynamic Fluid-Body Interaction) for .. fluid-body interaction %)

How is the DFBI model implemented? I can manage the Overset Mesh and the VOF multiphase model in the physics part.

[cwl]

How is the DFBI model implemented?

https://www.youtube.com/watch?v=AZkuHDzSqks