<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">Dear Oliver,<br>
<br>
what about the definition in the dune grid paper (part 1)?<br>
<br>
My understanding is this:<br>
<br>
Codim 0:<br>
- interior forms a partitioning of the set of all elements<br>
- overlap are elements to form a set of overlapping subdomains in
the<br>
sense of domain decomposition methods (I think there is no strict
definition)<br>
- ghost is similar but typically ghost elements only serve as the
minimum<br>
additional elements needed in addition to interior elements<br>
- A grid might have only interior elements(e.g. Yasp),
interior+overlap (e.g. Yasp),<br>
interior+ghost (UG, ALU), interior+overlap+ghost(none)<br>
<br>
Codim>0:<br>
- For any codim 0 entity all subentities of codim>0 are also
stored on that process<br>
- In general, a codim>0 entity has the same partition type as
the codim 0 entity that it is part of<br>
- since this may be non-unique, two additional partition types
exist: border and front.<br>
- border are entites on the boundary of interior to X where X is
either overlap or ghost<br>
- front are entites on the boundary from overlap to ghost<br>
<br>
Probably this is still ambiguous at some places, but it should
give the general idea.<br>
<br>
-- Peter<br>
<br>
<br>
<br>
Am 03.08.16 um 11:14 schrieb Bernd Flemisch:<br>
</div>
<blockquote cite="mid:57A1B5F3.6090308@iws.uni-stuttgart.de"
type="cite">
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
<div class="moz-cite-prefix">Hi Oliver,<br>
<br>
there has been some discussion on the dune-devel list, see for
example<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://lists.dune-project.org/pipermail/dune-devel/2013-November/000648.html">http://lists.dune-project.org/pipermail/dune-devel/2013-November/000648.html</a><br>
<br>
People agreed that this should be discussed in a meeting or a
small task force, but I am not aware of that this actually
happened.<br>
<br>
Kind regards<br>
Bernd<br>
<br>
On 08/03/2016 11:00 AM, Oliver Sander wrote:<br>
</div>
<blockquote
cite="mid:85ee3d50-e6bd-60c5-a240-26aaec08ac24@tu-dresden.de"
type="cite">
<pre wrap="">Dear Dune experts,
I am trying to explain the meaning of the overlapSize and ghostSize methods to someone,
and I've come to realize that I don't know it myself. I know it means something like
"the thickness of the overlap/ghost layers, measured in terms of elements", but is there
anything more precise? In particular, boths methods take integer arguments 'codim',
but I have no idea of how that argument is supposed to influence the result. What is
the most precise definition of the semantics of overlapSize and ghostSize that you know of?
Thanks,
Oliver
</pre>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Dune-devel mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:Dune-devel@dune-project.org">Dune-devel@dune-project.org</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://lists.dune-project.org/mailman/listinfo/dune-devel">http://lists.dune-project.org/mailman/listinfo/dune-devel</a>
</pre>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
_______________________________________________________________
Bernd Flemisch phone: +49 711 685 69162
IWS, Universität Stuttgart fax: +49 711 685 60430
Pfaffenwaldring 61 email: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:bernd@iws.uni-stuttgart.de">bernd@iws.uni-stuttgart.de</a>
D-70569 Stuttgart url: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="http://www.hydrosys.uni-stuttgart.de">www.hydrosys.uni-stuttgart.de</a>
_______________________________________________________________
</pre>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Dune-devel mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Dune-devel@dune-project.org">Dune-devel@dune-project.org</a>
<a class="moz-txt-link-freetext" href="http://lists.dune-project.org/mailman/listinfo/dune-devel">http://lists.dune-project.org/mailman/listinfo/dune-devel</a>
</pre>
</blockquote>
<br>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
------------------------------------------------------------
Peter Bastian
Interdisziplinäres Zentrum für Wissenschaftliches Rechnen
Universität Heidelberg
Im Neuenheimer Feld 205 (Mathematikon) Raum 1/401
D-69120 Heidelberg
Tel: 0049 (0) 6221 5414517
Fax: 0049 (0) 6221 548884
email: <a class="moz-txt-link-abbreviated" href="mailto:peter.bastian@iwr.uni-heidelberg.de">peter.bastian@iwr.uni-heidelberg.de</a>
web: <a class="moz-txt-link-freetext" href="http://conan.iwr.uni-heidelberg.de/people/peter/">http://conan.iwr.uni-heidelberg.de/people/peter/</a>
</pre>
</body>
</html>