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Periodic boundary conditions for moving reference frame (MRF) simulation)

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Old   April 14, 2015, 10:33
Default Periodic boundary conditions for moving reference frame (MRF) simulation)
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Bettina
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Hej!


I'm new to starccm+, trying to set up a moving reference frame simulation for a hydrodynamic bearing (spiral groove bearing).

Since I don't want to simulate the whole bearing (too high computational cost), I imported the geometry of only 36-part, which should be rotationally repeated (10x).

With tutorials I got as far as setting up periodic interfaces for the boundaries...
Does anyone have experience on which physics conditions/values I have to set for the periodic interface?
The fluid should not be driven by a pressure jump or mass flow, but just by the rotating part (i.e. the part in MRF) above the bearing.
I did try it with setting the pressure jump to 0.0Pa (zero), but the simulation didn't converge...


Thank you!
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Old   April 15, 2015, 06:55
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Gajendra Gulgulia
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Hi
Periodic boundaries are used to mirror the flow fields from one boundary to another amongst the boundaries in the interface. They do not need any physics condition per se.

I guess you are trying to simulate 3d axisymmetric case where I do not see any moving reference frame fitting in the bearing simulation.
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