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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi everyone,<br>
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I have a question about boundary integrals in dune-fem.<br>
<br>
Let's suppose you want to solve the Laplace equation; so I have taken dune-fem-howto where this problem is already implemented.<br>
However, if I wanted to implement different boundary conditions in different portions of the boundary, that tutorial needs to be enriched.<br>
<br>
The file functional.hh (for simplicity taken from the tutorial and attached to my mail) defines an integral functional, that is subsequently used to assemble the rhs of the Laplace equation.<br>
My questions are:<br>
<br>
1) what's the ratio behind this additional class? I've to confess I'm a bit lost. I don't get the different roles played by the operator (), applyLocal and the class AssembledFunctional.<br>
2) when I introduce a Neumann condition on a portion of the boundary, a new boundary contribution to the rhs arises. Would it be possible to modify the file into a new one, changing only some details?<br>
In this case, what do I have to change in the local functions and the quadrature points?<br>
<br>
Many thanks in advance! <br>
<br>
<div>Andrea<br>
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__________________________________________________________<br>
<br>
Andrea Sacconi<br>
PhD student, Applied Mathematics<br>
AMMP Section, Department of Mathematics, Imperial College London,<br>
London SW7 2AZ, UK<br>
a.sacconi11@imperial.ac.uk<br>
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