Periodic Repeats Interface not showing consistent coupling

Kina · May 24, 2017, 06:36

Hey Guys,
I set up a rotor/stator problem with translating sliding mesh motion. The rotor and stator region have periodic boundaries on their top and bottom sides respectively. The interface region is set up with the periodic repeats option. Though the solution is converging, it shows that the coupling of the periodic repeats interface is not consistent. I have translated the interface region geometry to show what is going on. The not-overlapping region of the interface is not consistent with the following stator part of the mesh (see picture).
Anybody knows if there is something I could have overlooked?

Cheers
Alex

http://imgur.com/a/CkbFc

Kina · May 29, 2017, 04:41

anybody with an idea what could have gone wrong? still working on the case with no reasonable solution

KaLium · May 29, 2017, 06:28

please send a picture of the mesh in that same area.

Kina · May 29, 2017, 07:02

This is the mesh in the exact area. As the simulation works with different codes, it was my thought that the periodic repeats interface may not work as I want it to.

Cheers
Alex

KaLium · May 29, 2017, 07:44

Mesh size is quite different in the problematic area. Try adapting the larger cells near the interface.

May 24, 2017, 06:36	Periodic Repeats Interface not showing consistent coupling	#1
Kina Senior Member Alex Join Date: Jan 2014 Posts: 126 Rep Power: 12	Hey Guys, I set up a rotor/stator problem with translating sliding mesh motion. The rotor and stator region have periodic boundaries on their top and bottom sides respectively. The interface region is set up with the periodic repeats option. Though the solution is converging, it shows that the coupling of the periodic repeats interface is not consistent. I have translated the interface region geometry to show what is going on. The not-overlapping region of the interface is not consistent with the following stator part of the mesh (see picture). Anybody knows if there is something I could have overlooked? Cheers Alex http://imgur.com/a/CkbFc Last edited by Kina; May 24, 2017 at 06:37. Reason: adding picture

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May 29, 2017, 04:41		#2
Kina Senior Member Alex Join Date: Jan 2014 Posts: 126 Rep Power: 12	anybody with an idea what could have gone wrong? still working on the case with no reasonable solution

May 29, 2017, 06:28		#3
KaLium Senior Member Kal-El Join Date: Apr 2017 Location: Finland Posts: 150 Rep Power: 9	please send a picture of the mesh in that same area.

May 29, 2017, 07:44		#5
KaLium Senior Member Kal-El Join Date: Apr 2017 Location: Finland Posts: 150 Rep Power: 9	Mesh size is quite different in the problematic area. Try adapting the larger cells near the interface.