1. Unlike Step-7, I have Neumann-only BCs. In my prior experience with
the FD and FV methods, this is a difficult problem. Is there any
specific advice that can help me with this?
But step-7 also has Neumann boundary conditions. What is different in
your case? That you *only* have Neumann boundary conditions? That
doesn't present any real additional difficulties in time-dependent problems.
2. Step-15 solves a static non-linear problem and step-26 solves a
linear time-dependent problem. I somehow need to combine these ideas to
solve my non-linear time-dependent problem. Does this mean, I first
make the problem a static one by time discretisation (Rothe method), and
apply Newton iterations at every time step. Also, it scares me to derive
the Newton update equation symbolically and was thinking of automatic
differentiation. Can this be done in an easier way than the sacado
package interface? Also, the amount of boiler-plate code and text
(step-33) for this auto diff is overwhelming for me.
These are all issues every user of deal.II has to sort out in some way
or other -- and all eventually do! Just jump in head-first and see where
things go :-)
In your case, I would start with a time discretized problem and add the
nonlinearity later on.
Best
W.
--
------------------------------------------------------------------------
Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
--
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/03b1e4b1-9290-9e14-0be9-fc37f1d483e0%40colostate.edu.
