Dear deal.ii community, I have a question regarding a simple heat equation. Assuming we have the following equation [image: heat_equation.png].
Is there a way to compute the actual numeric value of [image: dudt.png] at the quadrature points given the solution vector u? My first idea was to use quadratic elements and then just use FEValues.get_function_hessians() with the solution u, which seems to work. I was wondering if it is also somehow possible to use linear elements. For example, when multiplying by a test function w and doing integration by parts on the right hand side to shift one derivative to the test function. Would there be a way to evaluate this new expression to get [image: dudt.png]? Or would this then give me [image: w_dudt.png]? This is more of a theoretical question, but any comments or hints would be appreciated! Best, Johanna -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/b6902857-bd23-4d60-b8a9-79ec0f2bf968n%40googlegroups.com.
