- **OpenFOAM Bugs**
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- - **mpi problem with twoPhaseEulerFoam**
(*https://www.cfd-online.com/Forums/openfoam-bugs/77358-mpi-problem-twophaseeulerfoam.html*)

mpi problem with twoPhaseEulerFoamHello,
I think there is bug in OpenFOAM when using twoPhaseEulerFoam and try to run it parallel. I was trying to run "bed2" tutorial on 2 CPU's but it crashed. It works fine with single CPU. The description of the problem can be found here.It looks like the problem is coming from alpha equation. Below there is a printout from the log file. First the alpha equation is solved and max alpha=0.8, after correction of alpha equation, the min and max values of alpha are: Min(alpha) = -0.684932 Max(alpha) = 1.10975, which generates further problems. This is not the case when running it on single CPU.Courant Number mean: 0.0280557 max: 0.36132Regards,Max Ur Courant Number = 0.461666 Calculating averages Time = 0.9655 DILUPBiCG: Solving for alpha, Initial residual = 0.00161798, Final residual = 3.43713e-11, No Iterations 4 Dispersed phase volume fraction = 0.275303 Min(alpha) = -2.12575e-18 Max(alpha) = 0.802811 DILUPBiCG: Solving for alpha, Initial residual = 0.000113185, Final residual = 5.23969e-11, No Iterations 3 Dispersed phase volume fraction = 0.275303 Min(alpha) = -2.11835e-18 Max(alpha) = 0.802806 GAMG: Solving for p, Initial residual = 0.000399759, Final residual = 8.44465e-09, No Iterations 12 time step continuity errors : sum local = 3.62591e-09, global = -7.10158e-10, cumulative = 2.70152e-07 DILUPBiCG: Solving for alpha, Initial residual = 8.22487e-05, Final residual = 6.99567e-11, No Iterations 3 Dispersed phase volume fraction = 0.275303 Min(alpha) = -2.11584e-18 Max(alpha) = 0.802824DILUPBiCG: Solving for alpha, Initial residual = 8.09589e-06, Final residual = 0.00755801, No Iterations 1001 Dispersed phase volume fraction = 0.275245 Min(alpha) = -0.684932 Max(alpha) = 1.10975GAMG: Solving for p, Initial residual = 0.00143021, Final residual = 7.14171e-09, No Iterations 19 time step continuity errors : sum local = 3.07254e-09, global = 5.55504e-10, cumulative = 2.70707e-07 DILUPBiCG: Solving for epsilon, Initial residual = 0.00673291, Final residual = 2.54617e-06, No Iterations 5 DILUPBiCG: Solving for k, Initial residual = 0.00751057, Final residual = 3.37159e-06, No Iterations 5 Peter |

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