# Rotating Refrence Frame

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July 31, 2017, 06:35
Rotating Refrence Frame
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Bukhari
Join Date: Mar 2017
Posts: 8
Rep Power: 2
Hi! I am finding rotation based coefficients of submarine using rotating reference frame for steady simulation. The domain is circular containing submarine and I want to rotate submarine with 2 m/sec velocity (V=r*w where r=40m and w=0.05 rad/sec). At inlet of domain a linear profile of velocity is generated (max at outer radius and minimum at inner radius) so that the net velocity at centerline is 2 m/sec. What should be the angular velocity of reference frame?? Picture of domain is attached.
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 July 31, 2017, 20:20 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,874 Rep Power: 107 Isn't it 0.05 rad/s?

 August 1, 2017, 01:08 #3 New Member   Bukhari Join Date: Mar 2017 Posts: 8 Rep Power: 2 Yes it should be 0.05 rad/sec.How can I incorporate coriolois and centripetal force effect on rotating submarine

 August 1, 2017, 01:28 #4 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,874 Rep Power: 107 When you define the axis of rotation and the rotation speed then CFX automatically applies coriolis and centripetal effects to the rotating frame of reference.

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