oscillating with accelerate

rasool motamedi · July 24, 2015, 07:51

hi
i want rotate and oscillate stirrer with this equation by sliding mesh:
Vteta= C*sin(teta); C is constant

how can apply this type of rotation on subdomain?
stirrer is in a subdomain like picture.

in past i rotate it with presented cel
x=(x-Total Mesh Displacement X)*cos(2*pi/D*t)+(y-Total Mesh Displacement Y)*sin(2*pi/D*t)
y=-(x-Total Mesh Displacement X)*sin(2*pi/D*t)+(y-Total Mesh Displacement Y)*cos(2*pi/D*t)

but it has no accelerate or oscillate.

ghorrocks · July 24, 2015, 20:48

I don't fully understand your question, but if the motion is purely rotational then consider using rotating frames of reference.

If you are using moving mesh then this sounds like just a rotation transform which you can find easily on the web.

Martin_Sz · July 26, 2015, 03:15

can You try with immersed solid ??
That will be much easier

July 26, 2015, 03:15		#3
Martin_Sz Senior Member Marcin Join Date: May 2014 Location: Poland, Swiebodzin Posts: 232 Rep Power: 12	can You try with immersed solid ?? That will be much easier __________________ Quick Tips and Tricks, Tutorials FLuent/ CFX (CFD) https://howtooansys.blogspot.com/

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July 24, 2015, 20:48		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,690 Rep Power: 143	I don't fully understand your question, but if the motion is purely rotational then consider using rotating frames of reference. If you are using moving mesh then this sounds like just a rotation transform which you can find easily on the web.