H value in twophase flow
 

hello all. I am working on two phase flow when I check heat transfer coefficient, all the time it is negative, it starts from-9e9 to -47
I am using Euler>boiling>RPI
K-omega turbulent model
I tried both coupled and phase coupled simple, with different range of courant number and different relaxation value but again my H value in negative, when it is positive my mass balance exceeds 100 which must be almost zero:confused: