[Pj.]

Hi everybody,

I'm running a flow inside a channel with a LES turbulence model with pisoFoam using mpirun.

The simulation starts finely, the courant number is below 1 and the residuals are small enough, but then, suddenly, the simulation crashes.

Here are the logs files...

pisoFoam log (last iterations)

Time = 0.179

Courant Number mean: 0.103331 max: 0.753686
DILUPBiCG:  Solving for Ux, Initial residual = 0.00045336, Final residual = 2.92708e-06, No Iterations 1
DILUPBiCG:  Solving for Uy, Initial residual = 0.00204474, Final residual = 3.11798e-07, No Iterations 2
DILUPBiCG:  Solving for Uz, Initial residual = 0.00155674, Final residual = 4.13525e-06, No Iterations 2
GAMG:  Solving for p, Initial residual = 0.00324421, Final residual = 0.00011122, No Iterations 3
GAMG:  Solving for p, Initial residual = 0.000283797, Final residual = 1.25329e-05, No Iterations 5
time step continuity errors : sum local = 4.49319e-10, global = 2.29015e-13, cumulative = -1.67519e-09
GAMG:  Solving for p, Initial residual = 0.000215089, Final residual = 8.163e-06, No Iterations 3
GAMG:  Solving for p, Initial residual = 2.02541e-05, Final residual = 8.09815e-07, No Iterations 6
time step continuity errors : sum local = 2.90254e-11, global = 1.42406e-14, cumulative = -1.67517e-09
ExecutionTime = 1290.76 s  ClockTime = 1302 s

Time = 0.18

Courant Number mean: 0.103334 max: 0.753239
DILUPBiCG:  Solving for Ux, Initial residual = 0.00045237, Final residual = 2.91376e-06, No Iterations 1
DILUPBiCG:  Solving for Uy, Initial residual = 0.00203801, Final residual = 3.10315e-07, No Iterations 2
DILUPBiCG:  Solving for Uz, Initial residual = 0.00155273, Final residual = 4.33455e-06, No Iterations 2
GAMG:  Solving for p, Initial residual = 0.00323168, Final residual = 0.000110029, No Iterations 3
GAMG:  Solving for p, Initial residual = 0.000279401, Final residual = 1.23872e-05, No Iterations 5
time step continuity errors : sum local = 4.4384e-10, global = 2.2645e-13, cumulative = -1.67495e-09
GAMG:  Solving for p, Initial residual = 0.000214297, Final residual = 8.1158e-06, No Iterations 3
GAMG:  Solving for p, Initial residual = 2.00669e-05, Final residual = 8.06735e-07, No Iterations 6
time step continuity errors : sum local = 2.88982e-11, global = 1.08022e-14, cumulative = -1.67494e-09

error log

[29] 
[29] 
[29] --> FOAM FATAL IO ERROR: 
[29] error in IOstream "/eurora/home/userexternal/lamerio0/driverRegion_run/processor29/0.18/U_0" for operation Ostream& operator<<(Ostream&, const Scalar&)
[29] 
[29] file: /eurora/home/userexternal/lamerio0/driverRegion_run/processor29/0.18/U_0 at line 99612.
[29] 
[29]     From function IOstream::check(const char*) const
[29]     in file db/IOstreams/IOstreams/IOstream.C at line 99.
[29] 
FOAM parallel run exiting

that is repeated for each processor.

I ran the simulation twice thinking of a memory error or something not related to OF, but both the simulations gave the error at t=0.18. So I think it's something related to it.

I have totally no idea of what is going on. Does anyone can help me? Thank you very much,
bye