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<p>I'm sorry I should have provided that right away!<br>
<br>
I wrote a short MWE. All it does is create a vector into which I
interpolate a sine function.<br>
Then I use the gradientAdapter and write the gradient it to vtk.
The field itself is written without any problem,<br>
but the gradient field shows a tiny, but relevant disturbance at
the processor boundaries.<br>
</p>
<p>The MWE is in the form of a small dune-module.</p>
<p><b>build with:</b></p>
<p>./dune-common/bin/dunecontrol --only=gradReproducer all<br>
</p>
<p><b>run with: </b><br>
</p>
<p>mpirun -n 2 ./gradReproducer </p>
<p>Reproducer dune module and main.cc in appendix.</p>
<p>Thanks in advance,</p>
<p>Michael</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 01.08.19 14:28, Jö Fahlke wrote:<br>
</div>
<blockquote type="cite" cite="mid:20190801122852.GB17262@paranoia">
<pre class="moz-quote-pre" wrap="">Hi Michael,
could you point us to your reproducer, or at least the output of the
reproducer?
Regards,
Jö.
</pre>
</blockquote>
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