Keyur Kanade
Ansys Employee

Please check geometry in SpaceClaim. 
Select geometry in structure tree --> Use right click --> Select Check Geometry. (Or Tools - Fault Detection in DM)
The geometry should be error free to proceed. 
If geometry has any errors, please modify/recreate geometry at those places. 

While creating fluid domain please make sure that you do have tangential contact between different bodies. Make sure that bodies intersect with each other correctly. 

Please go through help manual for more details 

Regards,

Keyur

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