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Pipe with varying cross-section: change of tables in simulation context

Konra

Hallo,
ich habe seit der letzten Challenge das Problem, dass sich die Tabelle im Simulationskontext nicht ändern lässt. Egal wie oft ich die Simulation neu durchlaufen lasse, ich kann mir nicht den Totaldruck und y+ anzeigen lassen. Auch im Convergence monitor kann ich unter Physical quantities nur noch Lift, Drag und Moment auswhälen. Massenstrom ist nicht mehr vorhanden. Unten in der Tabelle werden verscheidene Werte angezeigt, aber nicht der Totaldruck und y+, wie ich es im Simulations output eingestellt habe.

So kann ich die Challenge leider nicht weiterbearbeiten.

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  • +1

    Hi Konra,

    I hope it is okay that I answer your question in English, so that also some other international students can follow this topic.

    You mentioned that you only see lift, drag and momentum. That sounds to me that the flow configuration of the simulation is set to external. Please set it internal.

    Then the physical quantities of the convergence monitor will switch to mass flow, pressure ration and efficciency. I assume that this should also solve the problem with the tabulated data.

    Please let know, if this fixed the problem.

    Best regards
    Manuel

  • 0 in reply to Manuel NIB

    Hi Manuel,

    thanks that solved my problem with the convergence Monitor.

    I still have a problem with the simulation: None of the two simulations is even close to reaching the convergence criterion of -8.0. The y1 Simulation has a mass flow error of 2.95% when finished. y50 has a mass flow error of 0.003081%. Is this to be expected? 

  • 0 in reply to Konra

    Hi Konra,

    please excuse my late response.

    The y1 simulation should reach the convergence criterion of -8. The simulation y50 should not. I would suggest let's first check, if your grid seems to be alright. Do you also have the following cell count?

    Best regards
    Manuel

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