[joshmccraney]

Hi FOAMers!

I'm draining a rectangular tank partially filled with liquid in low gravity. As time continues, liquid collects in the corners and eventually wicks into the drain port. However, my simulation crashes every time there is not constant liquid over the drain location.

For clarity, I've attached two times t1.png and t2.png. The liquid-gas interface is shown as a white curve. I've also included the tank outline. At t1 everything runs well. t2 crashes, with a final warning:

"mpirun noticed that process rank 0 with PID 0 on node josh-Latitude-E7470 exited on signal 8 (Floating point exception)."

I don't think this is a memory issue, because when I fill the tank higher initially, it runs to later times until the same phenomina in t2.png.

For BCs, in the U directory, at the drain location (called inlet) I specify

inlet
{
type flowRateInletVelocity;
volumetricFlowRate -0.2;
value uniform (0 0 0);
}

Your insight is greatly appreciated!

[joshmccraney]

I forgot to specify, but I'm modifying the tutorial here. It's super simple, but I'm so confused why the code breaks.

[joshmccraney]

So I figured out what the issue is, for future inquiry. If you're using the tutorial listed, the issue was in the alpha.water.org directory. Specifically, the inlet BC should be changed to type inletOutlet, the same as the outlet BC.

[helensimm]

What should I do if blockages periodically appear in my sewer system?

[TPayne]

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