November 12, 2018 at 7:40 amRashiSubscriber
I'm currently doing a stress analysis of an impeller. To reduce computational load I'm using cyclic symmetry, and I get this warning.
"The rotational angle for Cyclic/Periodic adjacent faces are shared by a common edge, but the angles do not match. Please confirm the geometry is symmetric."
Do I have to worry about this warning? I have correctly selected "Low section" and "High section".
November 12, 2018 at 2:17 pmSandeep MedikondaAnsys Employee
Please post an image to explain?
November 13, 2018 at 5:04 am
November 13, 2018 at 2:23 pmSandeep MedikondaAnsys Employee
November 15, 2018 at 12:48 pmRashiSubscriber
Thank you very much for your reply. I understand what you are saying. But I found some help file on ANSYS APDL which says this can be done for such geometry.
My issue is if this is possible in APDL why is not possible in Mechanical Workbench?
November 15, 2018 at 3:53 pmSandeep MedikondaAnsys Employee
Please remove those non-approved references from sharcnet. I request you to use ANSYS help which is updated and officially maintained.
Coming to your question, You can use your sector and what you have is just a warning. Your results are still valid as the angle α (in degrees) spanned by the sector satisfy this relation Nα = 360, where N is an integer.
The reason I believe you are seeing that warning is you have a sharp change in the angle of those 2 geometric faces. You see when it is straight or curved it is still one edge/face. Try cutting your model, as shown in this document on slide 22 (Which has the exact same geometry as yours).
November 16, 2018 at 6:48 amRashiSubscriber
Thank you very much for your explanation.
April 2, 2020 at 6:02 pmj.drozdowskiSubscriber
Hello I've got different problem with symmetry cyclic region. My case is quite simple. I've modeled one quarter of silo and set up cyclic symmetry region as shown on picture below. Using tips from this topic:
I've managed to display whole silo after meshing. I tried both methods "half" and "full" with different angels.
The problem is that I cannot display whole silo in results. It is just disappearing. What I'm doing wrong ?
April 18, 2020 at 4:47 pm
April 18, 2020 at 5:46 pm
April 20, 2020 at 6:09 pm
May 4, 2020 at 3:01 pmj.drozdowskiSubscriber
Yes. That is the solution that I was looking for. Thank you
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