Opened 9 years ago
Last modified 7 years ago
#3785 closed defect
Large differences in back-end and simcode time with FluidDissipation test cases — at Initial Version
| Reported by: | Francesco Casella | Owned by: | Lennart Ochel |
|---|---|---|---|
| Priority: | high | Milestone: | |
| Component: | Backend | Version: | |
| Keywords: | Cc: | Vitalij Ruge |
Description
Very similar test models using the Modelica.Fluid.Dissipation library take back-end times which are orders of magnitude different.
Consider, e.g., https://test.openmodelica.org/libraries/history/ModelicaTest_trunk-2016-03-21.html
ModelicaTest.Fluid.Dissipation.TestCases.PressureLoss.Bend: 253s ModelicaTest.Fluid.Dissipation.TestCases.PressureLoss.Orifice: 0.13s ModelicaTest.Fluid.Dissipation.Verifications.HeatTransfer.Channel.kc_evenGapLaminar: 0.86s ModelicaTest.Fluid.Dissipation.Verifications.HeatTransfer.Channel.kc_evenGapLaminar_KC: 1.75s ModelicaTest.Fluid.Dissipation.Verifications.HeatTransfer.HelicalPipe.kc_turbulent: 0.063s ModelicaTest.Fluid.Dissipation.Verifications.HeatTransfer.HelicalPipe.kc_turbulent_KC: 8s
SimCode times also vary similarly.
I suspect analytical Jacobians might be involved. In any case, it seems that the *_KC tests are really taking too much time.
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