[jeffery0630]

I added a switch (or something) to my case to only compute the pressure. But I was forced to drop the project for a while and I now I'm picking it up again. But now I want the residuals back and I don't remember how I turned them off.

This is what I see now:

Courant Number mean: 0.0005563993 max: 1.000097
deltaT = 4.40439e-07
Time = 8.63943e-06

PIMPLE: iteration 1
AMI: Creating addressing and weights between 73931 source faces and 73367 target faces
AMI: Patch source sum(weights) min:0.2762771 max:1.823033 average:1.006376
AMI: Patch target sum(weights) min:0.5344396 max:1.854972 average:1.002976
GAMG: Solving for pcorr, Initial residual = 1, Final residual = 0.07635187, No Iterations 2
GAMG: Solving for pcorr, Initial residual = 0.06917345, Final residual = 7.669559e-07, No Iterations 13
time step continuity errors : sum local = 2.270216e-15, global = 1.51368e-16, cumulative = 7.193733e-08
GAMG: Solving for p, Initial residual = 0.0009160147, Final residual = 4.06406e-05, No Iterations 1
GAMG: Solving for p, Initial residual = 0.0001185061, Final residual = 1.132687e-05, No Iterations 1
time step continuity errors : sum local = 1.008955e-08, global = 1.947538e-10, cumulative = 7.213208e-08

But this is what I want:

PIMPLE: iteration 1
AMI: Creating addressing and weights between 116720 source faces and 117446 target faces
AMI: Patch source sum(weights) min:0.9594485 max:1.258584 average:1.000118
AMI: Patch target sum(weights) min:0.8338208 max:1.073212 average:0.9997709
GAMG: Solving for pcorr, Initial residual = 1, Final residual = 0.07649504, No Iterations 6
GAMG: Solving for pcorr, Initial residual = 0.03494342, Final residual = 7.014825e-07, No Iterations 13
time step continuity errors : sum local = 1.844668e-08, global = -2.117243e-09, cumulative = -2.117243e-09
smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.06584307, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 1, Final residual = 0.06573879, No Iterations 2
smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.09440645, No Iterations 4

I've done folder compare with before and after but I don't see anything that would cause this. Does anybody have any ideas?

I can upload my system and constant directory if that will help.

[clapointe]

Without seeing the case it is hard to say, but off the top of my head -- momentum prediction needs to be on to solve the momentum equation (i.e., solve for velocity).

Caelan

[jeffery0630]

I was reading another post about a similar issue and I suspected I could have the same problem that guy had. In that other post various faces of the case were not setup correctly and that mesh was malformed which caused the smoothSolver (the part that prints out the residuals) to crash.

It turns out I was deforming the mesh too. The mesh had a few "underdeterminedCells" and I was using setSet & subsetMesh to remove them from the mesh. This cause pimpleFoam/smootSolver to crash. I guess I need to heal the mesh somehow.

Anyway, now that I think about it the switches I vaguely remember which would turn off certain terms in the solution were not for pimpleFoam. Now that I think about it, I may have been remembering switches I was setting on potentialFoam (-writePhi, -writephi).

[dlahaye]

Does below help?

* options to be used during runtime: extensive config file available to from OPEN_FOAM_PATH/1806/etc/controlDict (need to check). This controlDict can be copied to HOME/.OpenFOAM/1806. Change solver performance from 1 to 2 to obtain more verbosity in the solver.