[PSYMN]

Nope, these are all different methods... What matters is how the mesh is generated. The methods that work with the Density boxes all rely on top down meshing with a back ground grid... On the other hand, Hexa relies on a blocking structure that lets you mesh it any way you like... You can refine blocks in hexa or use blocking strategies (such as Ogrid) to refine the mesh...

The method closest to what you had seen in Gambit is the Patch Independent surface meshing with "quad" or "quad dominant". This method will accept density zones or sizing function in the same way (and for the same reasons) as they worked in Gambit...

Other methods, such as ICEM CFD Hexa, may be able to give a much higher quality mesh, but require a bit more practice and effort due to the higher level of user interaction. Have you tried the ICEM CFD Hexa tutorials?

Simon