Learning Forum

[yifan liu]

Hello,
I encountered a problem when I used the UDF “DEFINE_CG_MOTION” and sliding mesh, the warning message below popped up during simulation: Warning: incompatible interaction between moving mesh and dynamic mesh model.

Model and settings description:

1)the black one is blade,the red one is Trailing edge flap

2)The sliding grid method is used to control the rotating motion of the blade and flap around the y axis

3)I use “DEFINE_CG_MOTION” to control the swing of the trailing edge flap around the contact axis with the blade 

[Federico]

I would recommend you set the blade motion using Dynamic Mesh

[yifan liu]

I tried, but the trailing edge flaps need to swing relative to the blades while rotating with the blades, so the movement of the trailing edge flaps is too complex to be fully realized with a udf

[Federico]

You can set the motion as Relative Motion to a zone, even in Dynamic Meshing

12.6. Using Dynamic Meshes (ansys.com)

[yifan liu]

Thank you for your suggestion,I will try this way