Keyur Kanade
Ansys Employee

You will need to define correct sizing. Please use some local sizing such as face sizing. 

In global settings please use only curvature sizing. If you use proximity then it will increase cell count. 

Please go through help manual for more details 

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/flu_ug/tgd_user_sf_types.html

Regards,

Keyur

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