Dear deal.ii users,
I am working on a code to simulate the ion transport in a Newtonian
electrolyte and tried to rewrite the program in parallel using PETSc or
Trilinos. Thereby I encountered the following two problems:
1. In the tutorial step-17, I just compiled the code and made some
tests with different numbers processors. I saw that the number of required
iterations to solve the linear system is strongly dependent on the number of
processors:
#proc | required iterations in cycle 7
----------------------------------------------
1 | 123
2 | 134
8 | 151
What could be the reason for this behavior?
2. In order to make a decision between PETSc and Trilinos I also tried
step-32 (the parallel version of the stokes solver). For one processor it is
no problem to run the code, but when I use more the one, I get an error
message when I call stokes_constraints.distribute_local_to_global. Is there
a problem with my trilinos installation or doesnt this tutorial work at the
moment?
Thanks in advance,
Florian Keller
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Dipl.-Math. techn. Florian Keller
Institut für Mechanische Verfahrenstechnik und Mechanik, Universität
Karlsruhe (TH)
Straße am Forum 8, Geb. 30.70, D-76131 Karlsruhe
Tel.: +49 (0)721 608 - 2411
Fax: +49 721 608-2403
E-Mail: [EMAIL PROTECTED]
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