Sampat Kumar
Ansys Employee

Hi 
CTE is the thermal property of the material and it will not change on the basis of the shape of the object. Like for volumetric CTE = 3 Linear CTE. Here the CTE is the same but for easy calculation, we have denoted the term 3 *Linear CTE as volumetric thermal expansion. CTE is the property of the material and it will not depend upon the shape and size of the material. 

Regards,
Sampat