To study regression rate of droplet.........

Rajiv kumar

Hai I am going to study the regression rate of fuel droplet.So model I have is a rect chamber and a drop at the cente,which is stationary.Oxidizer are made to in from top face and out from bottom face.all side wall are made as heating wall..

So,my problem is that what boundary condition should I give to drop.And what way should I move further to get regression rate of droplet.

Thanking you