Learning Forum

[S.Shrestha-4]

 

Hi! I set up the simulation with two phases, with water at the beginning filling the domain, like you suggested. However, even after around 335k iterations, and the wall temperature having passed beyond the saturation temperature of water (423 K at 5 bar), evaporation is not taking place. Heat flux at lower wall is around 90 kW/m2, other wall is adiabatic. I used "to phase frequency" =10 s^-1.  There seems to start some nucleation at the bottom surface, but it’s taking way long to form bubbles, or is this normal? 

Also, I keep getting this:

 Reversed flow on 9 faces of pressure-outlet 11.
 344621  1.2086e-04  5.2476e-05  4.2446e-05  1.2394e-08  0:00:01  149
!344621 solution is converged
  step  flow-time report-def-1
 328052  7.7101e-01  4.1939e+02
Flow time = 0.7710071859378018s, time step = 328052
299948 more time steps

Updating solution at time level N…

Global Courant Number [Explicit VOF Criteria] : 0.000153432
 done.

It does not iterate and says converged, but the residuals look fine.