[biscarri]

hi community,

I'm running my first models using OpenFoam, the problem is a confined water flow, initial velocity is 0.1m/s, the solver is simpleFoam stationary

when postprocessing and animating the results through time steps I observe:
- first 6 to 10 time steps show big oscillations in the velocity field, with changes in velocity even reversing directions
- then these oscillations reduce and the flow field evolves to an each time more stable solution and reaches a visually quasi-converged solution
- after that, additional time steps produce an instabilization that yields in and error stop after 4 - 5 time steps
- cumulative time step continuity errors dramaticaly rise to e+60 order values

I attach the solver log file for the last iterations

thank's in advance for your comments