Moving wall imposed with rotation and revolution

Hubert Gu · May 9, 2018, 11:32

Hello,

I would like to impose a constant rotating velocity (Speed 300 rad/s) on a shaft wall by using Moving Wall, but the shaft also revolves as a rigid body. So the rotation-axis origin is changing with time, e.g. X(t), Y(t), Z(t).

sorry for my horrible English and hope you can understand me.

Is there any approach to set the central point changing with time?

Thank you very much!

Hubert Gu · May 14, 2018, 08:01

Help, please

Hubert Gu · June 20, 2018, 02:25

Help, please

`e` · June 20, 2018, 03:10

You could use a user-defined function to describe the time-dependent boundary condition with a DEFINE_PROFILE macro. A similar question has been asked at: Moving wall with velocity profile where you could start from the UDF suggested and then apply the translation of the origin.

Hubert Gu · June 20, 2018, 03:17

Quote:

Originally Posted by `e`

You could use a user-defined function to describe the time-dependent boundary condition with a DEFINE_PROFILE macro. A similar question has been asked at: Moving wall with velocity profile where you could start from the UDF suggested and then apply the translation of the origin.

Thank you very much! It is super helpful.
Have a nice day!

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May 14, 2018, 08:01		#2
Hubert Gu New Member Yandong Gu Join Date: Apr 2017 Posts: 13 Rep Power: 9	Help, please

June 20, 2018, 02:25		#3
Hubert Gu New Member Yandong Gu Join Date: Apr 2017 Posts: 13 Rep Power: 9	Help, please

June 20, 2018, 03:10		#4
`e` Senior Member Join Date: Mar 2015 Posts: 892 Rep Power: 18	You could use a user-defined function to describe the time-dependent boundary condition with a DEFINE_PROFILE macro. A similar question has been asked at: Moving wall with velocity profile where you could start from the UDF suggested and then apply the translation of the origin.