About two blade rotate around different axes

Vera Gu · March 17, 2019, 19:38

Dear all, I have a problem that has been bothering me for a long time and I have no idea about it.
I used multiple frame of reference to simulate a single blade. Then I am attempting to model the movement of two blades with different axes (x-axes and y-axes). Each blade located in their own domain (rotating domain) and these domains are located in a fixed domain (static domain) where the inlet and outlet are located. the setup only allows domain rotation around one point to be specified. I am not sure if it is the problem I set or whether the software really can't do this

.
Hope for your reply.

ghorrocks · March 17, 2019, 22:13

Please post an image of what you are trying to do.

Vera Gu · March 18, 2019, 00:15

Quote:

Originally Posted by ghorrocks

Please post an image of what you are trying to do.

I have posted images.

ghorrocks · March 18, 2019, 00:22

I just tried and set up a model with multiple domains with multiple rotation axes just fine. You just need to put each rotating domain in its own domain and you can specify any axis you like for both rotating domains.

AtoHM · March 18, 2019, 02:40

You can create a local coordinate system in the origin of your propellers and specify one of its axes as the rotation axis in the domain setup.

Vera Gu · March 18, 2019, 02:44

Quote:

Originally Posted by AtoHM

You can create a local coordinate system in the origin of your propellers and specify one of its axes as the rotation axis in the domain setup.

Thank you for your reply. I set another axis by two points to determine a straight line. I think I solved this problem.

March 17, 2019, 19:38	About two blade rotate around different axes	#1
Vera Gu New Member Shuoxin Gu Join Date: Nov 2017 Posts: 3 Rep Power: 8	Dear all, I have a problem that has been bothering me for a long time and I have no idea about it. I used multiple frame of reference to simulate a single blade. Then I am attempting to model the movement of two blades with different axes (x-axes and y-axes). Each blade located in their own domain (rotating domain) and these domains are located in a fixed domain (static domain) where the inlet and outlet are located. the setup only allows domain rotation around one point to be specified. I am not sure if it is the problem I set or whether the software really can't do this. Hope for your reply. Last edited by Vera Gu; March 18, 2019 at 00:13. Reason: post images

March 17, 2019, 22:13		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,716 Rep Power: 143	Please post an image of what you are trying to do. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

March 18, 2019, 00:22		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,716 Rep Power: 143	I just tried and set up a model with multiple domains with multiple rotation axes just fine. You just need to put each rotating domain in its own domain and you can specify any axis you like for both rotating domains. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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March 18, 2019, 02:40		#5
AtoHM Senior Member M Join Date: Dec 2017 Posts: 642 Rep Power: 12	You can create a local coordinate system in the origin of your propellers and specify one of its axes as the rotation axis in the domain setup.