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Old   April 19, 2005, 20:41
Default Direction of rotation
  #1
Gab
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Hi, All

I am doing tutorial 15: multiphase mixer. In that tutorial, the rotation speed of the impeller domain and shafts were set as 84 rpm. I was wondering what's the direction of the rotation. If look from up to down, do they rotate clockwise or counter clockwise? (I guess it's counter clockwise)

How can I show the rotation direction in cfx-pre or cfx-post?

Thanks

gab
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Old   April 20, 2005, 04:26
Default Re: Direction of rotation
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Kiddo
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It says that "Set Rotation Axis to Global X. " at page 306, so it means it rotates along X-axis with Right-Hand rule. The rotation direction is well defined.
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Old   April 20, 2005, 09:34
Default Re: Direction of rotation
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Robin
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To view the rotation, create a vector plot of "Velocity in STN Frame" (using hybrid values) on the walls of your rotating domain.

-Robin
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Old   April 20, 2005, 09:42
Default Re: Direction of rotation
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Gab
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Thanks, Kiddo and Robin.

If use right hand rule, the rotation direction should be counterclockwise. However,look at the blade angle shown in figure 1 of that tutorial, I understand that the rotation direction should be clockwise.

Can you further clarify this?

Thanks, with best regards!

Gab

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Old   April 20, 2005, 10:41
Default Re: Direction of rotation
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Kiddo
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Because in page302, it set the domain as rotating, so the flow vector is refered to the rotating frame (Just imagine you are in the ratating domain and the flow vector shown is what you will see)
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