I am tryng to calfem https://calfem-for-python.readthedocs.io/en/latest/calfem_examples.html for heat transfer and found an good old exemple on a pdf: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.byggmek.lth.se/fileadmin/byggnadsmekanik/publications/tvsm5000/web5187.pdf see exemple 7 on page 81 but at that time the program was pycalfem and some things change I tried to adapt every function and make it work on the new version but failed.