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July 26, 2018, 17:53 |
Rotating Squirrel Cage Fan
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#1 |
New Member
Mr. Stuart
Join Date: Jul 2018
Posts: 5
Rep Power: 8 |
Hello all.
I am relatively new to the CFX software. I was wondering I am attempting to run a simulation with a rotating fan. I've tried simply putting the total fan geometry in a enclosure and setting it up a solid rotating domain in a fluid domain. No such luck. I'm pretty green, please don't forget that. I am running it coupled with ansys 15. Thanks, Mr. Stu |
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July 26, 2018, 20:04 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,830
Rep Power: 144 |
It sounds like you are modelling the rotor as a solid domain. That is not correct. Please look at the CFX tutorial examples on rotating machinery as that will show you how to do it.
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July 26, 2018, 20:44 |
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#3 |
New Member
Mr. Stuart
Join Date: Jul 2018
Posts: 5
Rep Power: 8 |
Thanks a ton. Any one of the tutorials do you suggest? I don't have access to the turbo interface, I don't think.
Would immersed solid be more appropriate? This isn't anything like I remember from COMSOL. Lol |
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July 26, 2018, 20:55 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,830
Rep Power: 144 |
Any of the rotating machinery tutorials.
No, not immersed solids either You don't model the solid at all, with any method. Look at the tutorials.
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July 26, 2018, 20:57 |
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#5 |
New Member
Mr. Stuart
Join Date: Jul 2018
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Haha! Alrighty that's what I'll do.
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July 27, 2018, 15:58 |
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#6 |
New Member
Mr. Stuart
Join Date: Jul 2018
Posts: 5
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Alrighty, so I looked at a few of tutorials and took up the good fight once again!
Now, I have another issue: isolated fluid regions. Here's the scenario: I have placed my fan geometry inside a cylinder to outline it's rotational geometry, and placed that inside of a bigger cylinder ! I also cut 3/4 of it off for resource management. Alright, so, if the fan geometry is the crème in this oreo cookie, I have set up two frozen rotors for both of the chocolate cookies and the big encapsulating cylinder. Now, I am having issues with the crème to air interface. Any suggestions? I am using an opening boundary condition by the way. I have set the "fan" domain (fan geometry + fan blade span revolved) to rotate. Thanks a lot! Mr. Stu |
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July 27, 2018, 19:44 |
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#7 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,830
Rep Power: 144 |
As much as visualising oreo creme layers is useful an image would be better
The isolated fluid regions error means one or more of your interfaces are not connecting. You better check your interfaces. Also post some images of what you are modelling and the output file.
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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July 31, 2018, 14:15 |
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#8 |
New Member
Mr. Stuart
Join Date: Jul 2018
Posts: 5
Rep Power: 8 |
Thanks again for your help.
I am really unable to share any photos at this point. :/ I have tried simplifying it once again; created a cylindrical enclosure of my fan, and subtracted the fan while preserving the tool body. Set up the fan as its own fluid domain and assigned wall boundary conditions to surfaces, and of course made the enclosure a fluid domain. Thanks in advance. |
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