[haris]

Hi i am modeling a naca0012 in heavy rain.
I use the dpm model with steady particle treatment , 2 way coupled and turbulence coupling .

At the dpm boundary condition panel for airfoil wall i use the "reflect" BC with polynomial coefficient of restitution in terms of angle(i.e. e=a*θ)
The problem is that when fluent iterates for lets say 1000 iterations i open again the B.C. panel and find that the coefficient of restitution (that was set to a=1 from default) has changed to a different value that is not the same every time I cant find anything in the manual..

Any comments are welcome. I appreciate for your help.