Waruna Maddumage

Hi Rob, 

Thanks for the quick reply. All my other external boundaries are adiabatic, thus not affecting the heat transfer imbalance. Also, I am not modelling a spray. It's a low-velocity oil jet. The droplet formation is low. I reviewed the documentation and talked with an ANSYS expert in the last UK conference you guys had, I think VOF should be able to handle my case. 

Can I please bring your attention to my original question? My surrounding domain is large (filled with air) and will start cooling the metal geometry through natural convection. Isn't this the reason for the negative net heat transfer imbalance?