[Users] CarpetRegrid2 movement_threshold

Erik Schnetter schnetter at cct.lsu.edu
Tue Apr 16 09:37:40 CDT 2013


The old locations are only modified if the grid structure is changed. Can
you open a trac ticket, and post your parameter file, as well as relevant
output that describes the locations of the black holes and/or grid


On Tue, Apr 16, 2013 at 9:16 AM, Vassilios Mewes <vassilios.mewes at uv.es>wrote:

> Hello all,
> i have got a question about the CarpetRegrid2 process of regridding when
> supplying the thorn with information from puncture tracker...
> in a recent simulation of BH+torus system i did, the BH was moving
> significantly further than the movement_threshold i supplied in the par
> file, but Carpet never regridded...it seems to me that the new center is
> set at a frequency of regrid_every, but shouldn't it be reset only when the
> center has moved further than the movement_threshold parameter? as it seems
> to me at the moment, i would have to know the movement of the BH a priori
> in order to chose a sensible regridding frequency, because if the BH moves
> too little between regrid_every, it will eventually move out of the finest
> refinement level..
> furthermore, the regridding frequency might change during the run because
> the BH is actually accelerating...
> i am doing something wrong here or setting false parameters?
> best wishes,
> Vassili
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Erik Schnetter <schnetter at cct.lsu.edu>
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