# Direction of rotation

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 April 19, 2005, 20:41 Direction of rotation #1 Gab Guest   Posts: n/a 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

 April 20, 2005, 04:26 Re: Direction of rotation #2 Kiddo Guest   Posts: n/a 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.

 April 20, 2005, 09:34 Re: Direction of rotation #3 Robin Guest   Posts: n/a To view the rotation, create a vector plot of "Velocity in STN Frame" (using hybrid values) on the walls of your rotating domain. -Robin

 April 20, 2005, 09:42 Re: Direction of rotation #4 Gab Guest   Posts: n/a 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

 April 20, 2005, 10:41 Re: Direction of rotation #5 Kiddo Guest   Posts: n/a 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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