On 12/8/23 11:08, Johanna Meier wrote:
Thank you for your quick response Dr. Bangerth! The context I would like to
use du/dt in does not have a test function. So I guess I have to stick with
the 2nd order elements or use the finite differencing in time (Thank you for
the suggestion! I have not thought about that).
You lose one order of convergence with every derivative. You'll very likely be
better off using the finite differencing than evaluating the right hand side
of a second order PDE.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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