Tmax in reactingFoam depends on CFL-number (?)
Dear Foamers,
I am using OpenFoam-1.7.1 (git: 03e7e056c215). There is a tight dependence between "T gas max" and the CFL number in the reactingFoam tutorial case. Lower Courant-numbers lead to lower maximum temperatures and vice versa. In "applications/solvers/combustion/reactingFoam/chemistry.H" the line // Chalmers PaSR model kappa = (runTime.deltaT() + tc)/(runTime.deltaT() + tc + tk); with an _absolute_ runTime.deltaT() clearly is an error, isn't it? Also to test mesh dependence i tried this: I refined the original mesh from the tutorial from 4000 -> 400000 cells (x10 in both directions) and ran the tutorial again. It crashes both in single and parallel at around 0.0007s. I also tried removing runTime.deltaT() from the kappa-equation in the source code, recompiled it, and ran it to the same effect. At some point epsilon becomes negative and the solver crashes. Any ideas? Cheers, Andras |
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