Yeah. First question: What I mean is: in the material designer in workbench you can design lattice and tpms structures and calculate material properties such as young's modulus and shear modulus. Is it possible to use the material designer to calculate the coeffesient of diffusion as well? This is also a "material constant". 

Second question: is it possible to export the mesh we obtain in material designer?

Please let me know if you still do not understand my question.

Svenn Ove