[nomi.tahir]

I tried solving the rise of a spherical bubble of air in continuous fluid ( water) using VOF method but it diverges . Although I found a tutorial dealing with ink drop falling in water which was solved using VOF. What I dont get is that if an ink droplet simulation in water can be dealt using VOF then why is my solution diverging when I am doing it for rising bubble.
I did it with mixture model and it works . So kindly let me know why possibly my case diverging using VOF model but it's working with mixture model. Thanks for your help !