Building a mesh from an imported mesh - fill a cylinder?

[DrBwts]

I have a thin walled cylinder the mesh for which is calculated else where (for arcane reasons that dont impinge on the thread )

If I import this into CAE how can I mesh the hollow inside the cylinder?

 

[Mustaine3]

If you have a surface mesh (shell/membrane) that encloses a region, then you can fill it with tet elements.

Go into the mesh module and the select Mesh -> Edit. Look at the options you'll find here. There is one called 'Convert tri to tet'.