[Fluent] 3D Dynamic Mesh
 

Hello guys,

I tried implementing a valve opening/closing simulation inside a pipe using Fluent,

With 2D models, UDF and dynamic mesh are fine.

When using it on a 3D model, the cylindrical shape of the tube causes the moving wall geometry to change, resulting in a negative cell volume error.

How can I fix this?

Thanks!

p/s: I've attached the Geometries both 2D and 3D model

Attachment 99222

Attachment 99223