On 7/8/24 08:51, Nik Markus Leuenberger wrote:
I'm opening a new thread because the question is no longer whether or how to
use deal.ii for DG/finite volume implementations, but what I hope is a more
specific question regarding a combination of step-74 and step-72.
I want to use automatic differentiation to obtain the Jacobian for a
(non)-linear residual of a Poisson equation. (Non) is in brackets because I
would like to solve the linear case first in a single Newton-Raphson step.
The question described in more detail in the attached .pdf is how to use
automatic differentiation for the boundary_worker function of step-74.
Nik:
I'm not sure anyone can help with this problem short of debugging it in detail
-- which I think you'll have to do yourself. But it may be useful to see how
others have done something similar, for example in this recent code gallery
program:
https://dealii.org/developer/doxygen/deal.II/code_gallery_nonlinear_heat_transfer_with_AD_NOX.html
Best
W.
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Wolfgang Bangerth email: [email protected]
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