{"id":365279,"date":"2024-05-02T18:18:04","date_gmt":"2024-05-02T18:18:04","guid":{"rendered":"\/forum\/forums\/topic\/discontinuity-at-interface-between-rotating-and-stationary-domain\/"},"modified":"2024-05-02T18:18:04","modified_gmt":"2024-05-02T18:18:04","slug":"discontinuity-at-interface-between-rotating-and-stationary-domain","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/discontinuity-at-interface-between-rotating-and-stationary-domain\/","title":{"rendered":"Discontinuity at Interface between Rotating and Stationary Domain"},"content":{"rendered":"

Hello and thank you for reading my post,<\/p>\n

I am simulating an Isolated Propeller with a Frame Motion (Stationary Case) and Mesh Motion (Transient Case) in Fluent 2023 R1 and I am encountering in both Cases that there is a discontinuity at the Interface between both regions. I my Figure below one can see the Q-Criterion (with Axial Velocity) and that the tip vortices form as they should inside that Rotating Region. But as soon as the vortex hits the Interface, it seems that the vortex looses it’s rotating characteristic and just moves straight downstream. Normally the tip vortices should kind of spiral downwards.  <\/p>\n

I meshed my Stationary Domain and Rotating Domain individually. Then I merged both meshes in Fluent (first load one mesh in, then append the other). I manually created the Interface between both Regions, defined the Rotational movement for my rotating Region. In both Stationary and Transient cases, the vortices behave as in the figures below.<\/p>\n

The simulation from the figures contained the coarsest mesh of all, however the problem consists also in very fine meshes with very good quality. Max Skewness: 0.63, Min Orthogonal Quality: 0.20. No difference in cell size at the interface in both meshes.<\/p>\n

Thanks a lot and let me know if there is anything you’d need to know for helping.\"\"<\/p>\n

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