getting weird flows being shown at the interface of a transient rotor stator

crippled · May 1, 2014, 07:13

Hi,

Quicky summary: thick fluid, 1000rpm rotors, transient rotor stator. Fluid is stationary

There seem to be weird flows being shown at the interface. The streamlines are for the fluid domain, starting from a plane.

Just checking if this is correct and expected behaviour for a transient rotor stator? What have I done wrong?

Thanks!

Daniel Frederik · May 1, 2014, 07:47

I think you have the same problem as i do. The thing is that You have two domains a rotating and a stationary. When the fluid goes from the stationary into the rotating it changes referential frame and makes it appear to move differently.

Simulate the same thing with the same domains without that cross in it and you find out what i mean. Or Watch this post theres the same problem: http://www.cfd-online.com/Forums/cfx...g-domains.html

crippled · May 1, 2014, 09:39

oh, so is this wrong? I'm not sure if this is normal behaviour. I cant seem to find a reference anywhere.

Thanks!

ghorrocks · May 1, 2014, 10:07

Here's a reference - look in the FAQ: http://www.cfd-online.com/Wiki/Ansys...f_reference.3F

May 1, 2014, 07:13	getting weird flows being shown at the interface of a transient rotor stator	#1
crippled New Member Join Date: Apr 2014 Posts: 3 Rep Power: 12	Hi, Quicky summary: thick fluid, 1000rpm rotors, transient rotor stator. Fluid is stationary There seem to be weird flows being shown at the interface. The streamlines are for the fluid domain, starting from a plane. Just checking if this is correct and expected behaviour for a transient rotor stator? What have I done wrong? Thanks!

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May 1, 2014, 07:47		#2
Daniel Frederik Member Daniel Frederik Join Date: Apr 2014 Location: Switzerland Posts: 38 Rep Power: 12	I think you have the same problem as i do. The thing is that You have two domains a rotating and a stationary. When the fluid goes from the stationary into the rotating it changes referential frame and makes it appear to move differently. Simulate the same thing with the same domains without that cross in it and you find out what i mean. Or Watch this post theres the same problem: http://www.cfd-online.com/Forums/cfx...g-domains.html

May 1, 2014, 09:39		#3
crippled New Member Join Date: Apr 2014 Posts: 3 Rep Power: 12	oh, so is this wrong? I'm not sure if this is normal behaviour. I cant seem to find a reference anywhere. Thanks!

May 1, 2014, 10:07		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	Here's a reference - look in the FAQ: http://www.cfd-online.com/Wiki/Ansys...f_reference.3F