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-   -   How to use DEFINE_CG_MOTION and DIFINE_SDOF_PROPERTIES at the same time (https://www.cfd-online.com/Forums/ansys/190665-how-use-define_cg_motion-difine_sdof_properties-same-time.html)

liulangdefeng2222 July 19, 2017 14:01

How to use DEFINE_CG_MOTION and DIFINE_SDOF_PROPERTIES at the same time
 
Hi, everyone,
I want to simulate a airfoil making pitching osicilation. \alpha=10+5*sin(\omega*t). The airfoil rotates as the equation shown.

I want to write a UDF file to describe the motion and at the same time using 6DOF to simulation its motion in vertical direction.

Now I have used DEFINE_CG_MOTION(describe the oscilation motion) and DIFINE_SDOF_PROPERTIES(freeze the vertical direction) to describe the airfoil.

However, I found FLUENT can not use two micro for airfoil motion at the same time.
How can I solve the problem?
Best wishes.


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