Volumetric Meshing

Hello Guys,

I have a question. Is it possible to create a volumetric mesh in Blender? I have a clean object file consisting of a watertight regular surface mesh but would like to fill that object with an internal mesh. Any ideas if this is possible with blender? If not, can you please suggest softwares that are capable of producing such a volumetric mesh?

Thanks,

Khaled