- **OpenFOAM Running, Solving & CFD**
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- - **time step continuity error**
(*http://www.cfd-online.com/Forums/openfoam-solving/95317-time-step-continuity-error.html*)

time step continuity errorhi everyone,
I recently started to work with OP, so I have created a case as a cube which has inlet, outlet and walls.... I use icoFoam. Under /0/ directory I have p and U files. I created my mesh, but when I want to run the icoFoam I get the following error for time step continuity: --------------------------------------------------------------------------------------------- Create time Create mesh for time = 0 Reading transportProperties Reading field p Reading field U Reading/calculating face flux field phi Starting time loop Time = 0.001 Courant Number mean: 2.5e-05 max: 0.005 DILUPBiCG: Solving for Ux, Initial residual = 1, Final residual = 1.37371e-06, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0, Final residual = 0, No Iterations 0 DICPCG: Solving for p, Initial residual = 1, Final residual = 9.12929e-07, No Iterations 100 time step continuity errors : sum local = 4.56464e-11, global = 8.537e-14, cumulative = 8.537e-14 DICPCG: Solving for p, Initial residual = 0.000597641, Final residual = 9.14417e-07, No Iterations 73 time step continuity errors : sum local = 1.99697e-08, global = 2.57976e-10, cumulative = 2.58061e-10 ExecutionTime = 0.15 s ClockTime = 0 s Time = 0.002 Courant Number mean: 0.0100006 max: 0.0100859 DILUPBiCG: Solving for Ux, Initial residual = 0.991413, Final residual = 2.94309e-07, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.352816, Final residual = 2.70294e-07, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00283373, Final residual = 8.46871e-07, No Iterations 81 time step continuity errors : sum local = 1.49667e-08, global = -1.2039e-10, cumulative = 1.37671e-10 DICPCG: Solving for p, Initial residual = 0.00322282, Final residual = 8.57637e-07, No Iterations 80 time step continuity errors : sum local = 3.41541e-09, global = -4.48079e-12, cumulative = 1.33191e-10 ExecutionTime = 0.2 s ClockTime = 0 s so I don't know exactly where is my mistake... it would be nice if someone can help me to find my mistake, Thanks Rosh |

hi Rosh,
there is no mistake , your log looks good. The lines time step continuity errors : sum local = 3.41541e-09, global = -4.48079e-12, cumulative = 1.33191e-10are numerical error estimations . Your values are small. Keep foaming ... Bandfrosch |

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