droplet evaporation on a substarte

Hello,

I am trying to simulate the simplest case ever! It is a water droplet onto a glass surface. I am using Laminar flow and heat transfer module to do it.

I am really new on this and I am not really sure if I should use CFD. I do not have it and if it is worth it, I will purchase..but I do not know.

Any help would be useful.

Thanks