Dear All,
I've started testing the GeFEM library and I've some questions, with particular reference to the Python interface (the only one I can use so far):
1) the "add_lumped_mass_for_first_order_brick" method is not available even though it is mentioned in the Python-Model guide for GetFEM 5.4. I've installed the precompiled 5.4 version for Windows with getfem5.4win-amd64-py3.7.exe. How can I get the Lumped_Mass feature for the Python interface?
2) The documentation of bricks like "Generic Elliptic Brick", "Fourier_Robin Brick" and "Source Term Brick" states that the coefficients could be arbitrary GWFL expressions. What happens if I'd input non-linear coefficients? How the software manages the assembly in this case? Or, it would be better to use the Model method "add_non_linear_term"?
3) If I'd like to implement a radiation non-linear boundary condition, what would be the more advisable way? Is in this case the "add_non_linear_term" method the correct way?
4) I've not understood what is the difference between "add_source_term" and "add_source_term_brick". Can you advise when I should use one or the other (with a practical example).
5) Is there a way to visualize mesh regions for doublecheck purposes? Maybe, is there a way to export such regions by means of the Python interface?
Thank you in advance for your kind support.
Regards,
Lorenzo