HELP!

can anyone tell me if this is logic?

10mm thick stainless steel. Inner (900'C) to outer with convection on the outside surface.

analysis is 3d

https://preview.redd.it/pqunpqa6j2aa1.png?width=1360&format=png&auto=webp&v=enabled&s=199792b696b43881785f5f05d0144ab9a08bbf22

https://preview.redd.it/8ybj7gbvj2aa1.png?width=1432&format=png&auto=webp&v=enabled&s=3105dc75c3d7d2b57dc8f09079d8bcba27c2496b