Keyur Kanade
Ansys Employee

You will need to slice the geometry. 

Please check following videos

Ansys Meshing Sizing:

Ansys Meshing: Decomposition for hex meshing:

Ansys Meshing: Meshing Methods:

Ansys Meshing: Inflation:

Regards,

Keyur

How to access Ansys Online Help Document

Guidelines on the Student Community