Fluid-Solid interface frame change - Frozen rotor or NONE?

zhaitb · November 28, 2015, 01:05

Thank you, ghorrocks.

Now I am wondering if I want to model the rotating solid domain in a stationary fluid domain, can I set the wall velocity as the rotating velocity for the fluid side of the fluid-solid interface?
(Define the fluid side of fluid-solid domain interface to be moving at the specified velocity)

If not, what is the common practice in CFX to account for this?

Thank you again for your help.

ghorrocks · November 28, 2015, 04:43

I do not know what you are trying to do so cannot say.

zhaitb · November 28, 2015, 23:54

Hello Ghorrocks,

Attached is the geometry for meshing. The highlighted part is a rotating coupling with hallow. I intend to model the solid domain in order to take heat transfer into consideration.

In order to model a rotating solid part in stationary fluid, how should I set in CFX? I believe I need a rotating reference frame (set rotating speed for fluid domain), but how should I treat the solid domain? Can I set it as stationary domain, does this reflect actual physical situation?

Capture.PNG

ghorrocks · November 29, 2015, 18:09

Read the documentation about solid regions. It explains the options and their implications.

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November 28, 2015, 01:05		#21
zhaitb New Member Jack Join Date: Jan 2015 Posts: 12 Rep Power: 13	Thank you, ghorrocks. Now I am wondering if I want to model the rotating solid domain in a stationary fluid domain, can I set the wall velocity as the rotating velocity for the fluid side of the fluid-solid interface? (Define the fluid side of fluid-solid domain interface to be moving at the specified velocity) If not, what is the common practice in CFX to account for this? Thank you again for your help.

November 28, 2015, 04:43		#22
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,018 Rep Power: 146	I do not know what you are trying to do so cannot say.

November 28, 2015, 23:54		#23
zhaitb New Member Jack Join Date: Jan 2015 Posts: 12 Rep Power: 13	Hello Ghorrocks, Attached is the geometry for meshing. The highlighted part is a rotating coupling with hallow. I intend to model the solid domain in order to take heat transfer into consideration. In order to model a rotating solid part in stationary fluid, how should I set in CFX? I believe I need a rotating reference frame (set rotating speed for fluid domain), but how should I treat the solid domain? Can I set it as stationary domain, does this reflect actual physical situation? Capture.PNG

November 29, 2015, 18:09		#24
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,018 Rep Power: 146	Read the documentation about solid regions. It explains the options and their implications.