<div dir="ltr"><div>Dear Dune-Fem developers, <br></div><div><br></div><div>I recall one of my old posts on this topic: <a href="http://lists.dune-project.org/pipermail/dune/2015-February/013459.html" target="_blank">http://lists.dune-project.org/pipermail/dune/2015-February/013459.html</a><br></div><div>which I had posted on main Dune mailing list. I am trying to build my Dune-Vem module under Dune-Fem by trying to use as much functions from Dune-fem as possible. <br><br></div><div>In
order to "build" a polygon for my method: I first create a mesh the usual way (either
Gmsh or in Dune itself) and then partition it using ParMETIS to
agglomerate the finite elements. One such agglomerated unit is one of my
polygons and so on. <br><br>Now, I am trying to understand if it will
be possible to treat these polygons (which are basically agglomerated
finite elements) as finite elements in their own right in Dune? I can
compute a given function f at the quadrature points inside the polygons
and do int_Omega f, but obviously I need more. For eg, if an
agglomeration can be treated as one finite element, how do I evaluate the
basis function phi_i, its derivatives and then do a subsequent assembly
for them? To be precise, the methods which are already in place in dune-fem to do
exactly this, can I use them to operate on my polygons? For eg. when
reusing the dune-fem code, I would like to use methods such as
localFunction.evaluate, rhsLocal.axpy and rhs.communicate but I do not
understand how to and what to change in order to achieve this.<br><br></div><div>Many thanks for your help,<br></div>Ganesh</div>