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how to use FSI and rotating machine models together?
Posted 27 gen 2012, 13:49 GMT-5 4 Replies
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Hi,
I did a 2d rotation simulation using the rotating machine physics and it works. But in my case, an air fan instead of the inner circle should rotate because of the inlet air pressure and there should be some little deformation on the fan blade under the pressure. How can I do it?
Is that Ok if I use FSI and how can I do it?
Thank you for the help!
Have a good day!
I did a 2d rotation simulation using the rotating machine physics and it works. But in my case, an air fan instead of the inner circle should rotate because of the inlet air pressure and there should be some little deformation on the fan blade under the pressure. How can I do it?
Is that Ok if I use FSI and how can I do it?
Thank you for the help!
Have a good day!
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4 Replies Last Post 27 gen 2012, 15:59 GMT-5
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Posted:
1 decade ago
Hi
One way would be to say the air pressure does not deform a lot your rotating part, and that this deformation will not have any major influence on your air pressure.
Ten you can calculate the pressure from a CFD moel with rotating elements, and perform separately a structural analysis by using the precalculated pressure as boundary loading.
But I would then also suggest to add the roational centrifugal body force from the rotation speed, as I suspect this force could be stronger and would also change the shape and stress level seen by the fan blades
--
Good luck
Ivar
One way would be to say the air pressure does not deform a lot your rotating part, and that this deformation will not have any major influence on your air pressure.
Ten you can calculate the pressure from a CFD moel with rotating elements, and perform separately a structural analysis by using the precalculated pressure as boundary loading.
But I would then also suggest to add the roational centrifugal body force from the rotation speed, as I suspect this force could be stronger and would also change the shape and stress level seen by the fan blades
--
Good luck
Ivar
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Posted:
1 decade ago
Hi Ivar,
Thank you for your reply!
My problem is the fan should be rotated by the air pressure instead of a given rpm, how can I do it and which model I should used?
Is there any example or tutorials?
Thank you for your help!
Thank you for your reply!
My problem is the fan should be rotated by the air pressure instead of a given rpm, how can I do it and which model I should used?
Is there any example or tutorials?
Thank you for your help!
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Posted:
1 decade ago
Hi
even if it is the air that defines the rpm speed, you still can analyse that from your cfd model, and then apply pressure load and pm speed to a separate solid analysis.
A fully coupled rotating FSI model is still possible but far more complex to set up and to solve, and I suppose you must "hand knit" it by your own, I do not know of one such pre-cooked physics
There are at least one fan model around, not sure if its in the library or on the main web site (I'm not by my COMSOL WS so I cannot search it up)
--
Good luck
Ivar
even if it is the air that defines the rpm speed, you still can analyse that from your cfd model, and then apply pressure load and pm speed to a separate solid analysis.
A fully coupled rotating FSI model is still possible but far more complex to set up and to solve, and I suppose you must "hand knit" it by your own, I do not know of one such pre-cooked physics
There are at least one fan model around, not sure if its in the library or on the main web site (I'm not by my COMSOL WS so I cannot search it up)
--
Good luck
Ivar
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Posted:
1 decade ago
Thank you, it is really helpful