Mat-1.3656 Seminar on
numerical analysis and computational science
Monday, Feb 2, 2008, room
U322 at 14.15, Eirola & Stenberg
Peter Råback, CSC
On the solution of multiphysical problems with Elmer finite element software
Multiphysical
problems arise when two or more different physical phenomena are
coupled with one another. The solution of multiphysical problems is not
necessarily particularly difficult - in many fields it has been done
long before the concept even existed. The difficulty depends very much
on the nature and strength of the coupling.
Elmer is a finite
element software developed for the solution of multiphysical problems.
Usually Elmer uses iterative (block Gauss-Seidel) schemes for the
solution of such problems. For inherently coupled problems also
monolithic schemes are employed. For some selected problems there also
some hybrid schemes that combines the good convergence properties of
the monolithic method with the easy implementation of the iteration
method. Often these involve the modification of the original set of
equation in a consistent manner.
The presentation is two-fold.
First we give an overview of Elmer software and its multiphysical
features. In the second part we go through some real-life examples
where different strategies have been used to achieve convergence.
References
[1] http://www.csc.fi/elmer, Elmer finite element software homepage