<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Jun 22, 2017 at 12:59 AM, Adrian Croucher <span dir="ltr"><<a href="mailto:a.croucher@auckland.ac.nz" target="_blank">a.croucher@auckland.ac.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div class="m_6093840453388227652moz-cite-prefix">On 21/06/17 23:12, Matthew Knepley
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<div>From the above description, its not clear to me that
you want this topology. For example, in the case that each
cell gets an internal cell,</div>
<div>it seems like you could just handle this in the
function space for each cell. Even for multiple internal
cells, it seems like function space</div>
<div>parameterization is a better option. Topology is
supposed to indicate the support of basis functions, but
here that job is done. I would</div>
<div>just treat it as some sort of augmented approximation
space.</div>
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If I understand what you mean, I considered doing something like
that- basically just defining extra degrees of freedom in the cells
where dual porosity is to be applied.<br>
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It seemed to me that if I then went ahead and created the Jacobian
matrix using DMCreateMatrix(), it would give me extra nonzero
entries that shouldn't be there - interactions between the dual
porosity variables in neighbouring cells. Is there any way to avoid
that?</div></blockquote><div><br></div><div>Ah, this is a very good point. You would like sparse structure in the Jacobian blocks. Currently I do not have it,</div><div>but DMNetwork does. I have been planning to unify the sparsity determination between the two. It is on the list.</div><div><br></div><div> Thanks,</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000"><span class=""><br>
- Adrian<br>
<pre class="m_6093840453388227652moz-signature" cols="72">--
Dr Adrian Croucher
Senior Research Fellow
Department of Engineering Science
University of Auckland, New Zealand
email: <a class="m_6093840453388227652moz-txt-link-abbreviated" href="mailto:a.croucher@auckland.ac.nz" target="_blank">a.croucher@auckland.ac.nz</a>
tel: <a href="tel:+64%209-923%204611" value="+6499234611" target="_blank">+64 (0)9 923 4611</a>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="http://www.caam.rice.edu/~mk51/" target="_blank">http://www.caam.rice.edu/~mk51/</a><br></div></div></div>
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