[mary779]

hi guys.can somebody tell me that what this error means? i am really confused. after 617 iteration this error happened.
i am modeling a two phase flow problem in a pipe ( a horizontal pipe with gravity at x-direction=+9.81 , so it behaves like a vertical pipe with downward flow) . (diameter=2.5 cm - length=1 m) for symmetric model i used this size of mesh=125 * 10000
saturated water (laminar) at inlet with 0.011 kg/s mass flow rate and wall's temperature=378.15 kelvin
and i am using transient - vof - courant number=0.23 - solution method = simple and for momentum and energy = quick , for volume fraction = Geo-Reconstruct - under relaxation factors: momentum=0.2 , pressure=0.5 - time step=0.001
do you have any suggestion that how can i fix this error ? i really appreciate your help.
excuse me if i didn't explain my problem good. i am new to CFD.
thanks, mary