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Diffstat (limited to 'param.ccl')
-rw-r--r-- | param.ccl | 20 |
1 files changed, 20 insertions, 0 deletions
@@ -528,6 +528,26 @@ boolean mask_is_noshrink \ } "true" # +# If we're using mesh refinement (eg Carpet) it's possible to find a +# horizon on a fnie grid, and then set a mask on a coarser grid where +# the masked-off region is only a few grid points across. This then +# confuses various other thorns (eg LegoExcision) which require excised +# regions to be "not too small". +# +# So... This parameter may be used to specify that the mask not be set +# for a given horizon (just as if that horizon wasn't found) on any grid +# where the ratio +# BH_diagnostics.min_radius / max(Delta_x,Delta_y,Delta_z) +# (where Delta_[xyz] are the *LOCAL* grid spacings on the current grid) +# is too small (in particular, < this parameter). +# +real min_horizon_size_for_mask \ + "only set mask if min horizon radius >= this number of local grid spacings" +{ +0.0:* :: "any real number >= 0.0" +} 0.0 + +# # This thorn supports two types of mask grid functions: # * the "old" style is that defined by CactusEinstein/AHFinder: # the mask is a CCTK_REAL grid function, which is set to specified |