<div dir="ltr"><div>May not be a high-tech answer, but people usually only write a vtk file in every nth time step (like every 10th or so). You still see the overall behaviour, but you save some disk space.<br><br></div>Dominic<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jul 27, 2015 at 7:05 PM,  <span dir="ltr"><<a href="mailto:conf86@web.de" target="_blank">conf86@web.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Thank you for your fast answer.<br>
<span class=""><br>
> Are you using ascii-mode to write the files (the default)?  Use appendedraw<br>
> instead, see<br>
> <a href="https://www.dune-project.org/doc/doxygen/html/dune-grid_2dune_2grid_2io_2file_2vtk_2common_8hh.html" rel="noreferrer" target="_blank">https://www.dune-project.org/doc/doxygen/html/dune-grid_2dune_2grid_2io_2file_2vtk_2common_8hh.html</a><br>
<br>
</span>I use a modification of the course examples and it seems they already use appendedraw:<br>
<br>
 Dune::SubsamplingVTKWriter<GV> vtkwriter(gv,3);<br>
 Dune::PDELab::addSolutionToVTKWriter(vtkwriter,gfs,unew);<br>
 vtkwriter.write(fn.getName(),Dune::VTK::appendedraw);<br>
 fn.increment();<br>
<div class="HOEnZb"><div class="h5"><br>
Best regards<br>
<br>
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