Just to add to rwoolhou's comments, you can use the k-Eps turbulence model to solve your problem. However, I do not think that is going to be the bottleneck. As mentioned by rwoolhou, you will have to check if you are getting reasonable results using VOF. Getting your VOF model up and running will take some effort.
I'd strongly recommend a literature review before jumping into the model. You might get some test problems to play with before attempting to solve your problem - just to get the ball rolling in the right direction.
please let us know if you have any additional questions.