<div dir="ltr">Jens<div><br></div><div>If a horizon is not found, then I suspect insufficient resolution. You should be able to choose different prolongation operators for spacetime and hydrodynamics. Since the geometry is not refluxed, you could use a higher order operation there, while staying with linear interpolation for hydro.</div><div><br></div><div>-erik</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Wed, Jan 9, 2019 at 3:05 PM Jens Mahlmann <<a href="mailto:jensmahl@alumni.uv.es">jensmahl@alumni.uv.es</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Dear all,</p>
<div><br>
</div>
<div>I have recently changed my hydro simulations to the Refluxing
strategy implemented by Erik Schnetter. For this I have changed
the standard configuration to a <b>cell centred refinement,
staggered boundaries and low order spatial prolongation for the
hydro variables</b>. Since then I experience problems with BSSN
or, more specifically, the QuasilocalMeasures thorn (a=0.9 black
hole). After an initially fine behaviour, <b>no Eigenvector with
value one is found and the spacetime gradually crashes</b>. </div>
<div><br>
</div>
<div>I am still puzzled where this is coming from. Does anybody have
some experience with the combination spacetime evolution + hydro
refluxing, i.e. the somewhat different grid setup? I would be glad
for any input to see where I start to fix my work.</div>
<div><br>
</div>
<div>Thank you very much and my best from Valencia </div>
<div><br>
</div>
<div>Jens <br>
</div>
</div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Erik Schnetter <<a href="mailto:schnetter@cct.lsu.edu" target="_blank">schnetter@cct.lsu.edu</a>><br><a href="http://www.perimeterinstitute.ca/personal/eschnetter/" target="_blank">http://www.perimeterinstitute.ca/personal/eschnetter/</a></div><div><br></div></div></div>