[Users] Spacetime evolution with hydro refluxing

Erik Schnetter schnetter at cct.lsu.edu
Wed Jan 9 18:59:46 CST 2019


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.


On Wed, Jan 9, 2019 at 3:05 PM Jens Mahlmann <jensmahl at alumni.uv.es> wrote:

> Dear all,
> 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 *cell centred refinement, staggered boundaries and low
> order spatial prolongation for the hydro variables*. Since then I
> experience problems with BSSN or, more specifically, the QuasilocalMeasures
> thorn (a=0.9 black hole). After an initially fine behaviour, *no
> Eigenvector with value one is found and the spacetime gradually crashes*.
> 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.
> Thank you very much and my best from Valencia
> Jens
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Erik Schnetter <schnetter at cct.lsu.edu>
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