- **OpenFOAM Running, Solving & CFD**
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- - **Problem in sonicFoam**
(*https://www.cfd-online.com/Forums/openfoam-solving/60127-problem-sonicfoam.html*)

I used the mesh in forwardStepI used the mesh in forwardStep, and applied my own boundary condition, it's running pretty well. But when I introduced another mesh, say pitzDaily from coodles with the same boundary condition setting. Then it shows:
Starting time loop Time = 0.002 Mean and max Courant Numbers = nan nan diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0 BICCG: Solving for Ux: solution singularity BICCG: Solving for Uy: solution singularity BICCG: Solving for Uz: solution singularity BICCG: Solving for e: solution singularity BICCG: Solving for p: solution singularity diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0 time step continuity errors : sum local = nan, global = nan, cumulative = nan BICCG: Solving for p: solution singularity diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0 time step continuity errors : sum local = nan, global = nan, cumulative = nan ExecutionTime = 66.33 s ClockTime = 66 s I tried to use different value of deltaT, but it doesn't help. Wondering why the courant number is nan. Welcome any help. Thanks! |

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