[jyin]

Hello,

I want to run a CFD simulation using VOF. Where two phases exist: air and water. I want to give a constant force to the droplet to see how much speed the water droplet can get eventually. However, I don't know how to give the droplet a constant force.

I know I can use patch method. But this method can only provide the force in the initial state. I want to add the force to the droplet during the simulation time. Can I get some recommendations on how to deal with this problems ?

Thanks in advance!

[PKP_India]

* Just a thought

Hi,

if possible try to add a momentum source term equivalent to your constant force and implement it only to cells with VOF(water)>0.9.