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Old   October 28, 2015, 22:29
Default Single Domain Rotating Frame Reference
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hi! just wanted to know if cfx can do a rotating frame of reference using only a single domain? Im trying to compare results of this (if applicable) to the ones used on my previous fan blade simulation using Multiple domains (rotor-stator).

I used a big domain with 2 blades wall surface cutout from that and assign a counter rotating wall to make it stationary and let the domain be rotating. Then I used the 3 remaining surfaces of my cylinder (top-bot-radial surf) as an opening (coz im running this in an open ambient condition). When i start to run this simulation it wont run.

Help pls? Thanks!
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Old   October 29, 2015, 06:13
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Quote:
Originally Posted by mariconeagles96 View Post
hi! just wanted to know if cfx can do a rotating frame of reference using only a single domain? Im trying to compare results of this (if applicable) to the ones used on my previous fan blade simulation using Multiple domains (rotor-stator).

I used a big domain with 2 blades wall surface cutout from that and assign a counter rotating wall to make it stationary and let the domain be rotating. Then I used the 3 remaining surfaces of my cylinder (top-bot-radial surf) as an opening (coz im running this in an open ambient condition). When i start to run this simulation it wont run.

Help pls? Thanks!
You can use a Single Reference Frame Model if you don't have baffles at the stator wall. In this case the whole domain will be rotating, the velocity of blades referred to the rotating system will be 0 and the velocity of the lateral cylinder (stator wall) will be -omega (counter rotating wall)
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Old   October 30, 2015, 01:45
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thanks @highorder_cfd.

yes i dont have baffles on it so a rotating domain is applicable. I am already doing this setup but wont run. I have only 1 part and that is the big domain with a blade cut out. I make the walls of the big domain rotating as well as its domain is already rotating. The blade cutout surface is also rotating but assigned a counter rota wall to simulate it as stationary. I have no interfaces since I only have one domain one part. This setup wont run and I have to settle for a mesh deformation option inorder for this simulation to push through. Any more ideas?

Thanks! =)
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Old   October 30, 2015, 04:56
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Quote:
Originally Posted by mariconeagles96 View Post
thanks @highorder_cfd.

yes i dont have baffles on it so a rotating domain is applicable. I am already doing this setup but wont run. I have only 1 part and that is the big domain with a blade cut out. I make the walls of the big domain rotating as well as its domain is already rotating. The blade cutout surface is also rotating but assigned a counter rota wall to simulate it as stationary. I have no interfaces since I only have one domain one part. This setup wont run and I have to settle for a mesh deformation option inorder for this simulation to push through. Any more ideas?

Thanks! =)
Can you post an figure of your domain?
Thanks
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