Keyur Kanade
Ansys Employee

I am assuming you are using Fluent Meshing Watertight Workflow. Please check following link which also covers some local sizing. 

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwig6Z-Tupb5AhXJTWwGHYDTDUYQwqsBegQIAhAB&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DaBxbYRVoRLo&usg=AOvVaw3dk7d_kenm3QZ_GsKWiHqq

 

It is recommended to create NS in SpaceClaim and then import geometry in Fluent Meshing. 

Please go through help manual for more details 

Regards,

Keyur

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