#: Parameter definitions for thorn Dissipation
# $Header$

shares:SpaceMask

USES boolean use_mask

restricted:

BOOLEAN verbose "produce log output" STEERABLE=always
{
} "no"

INT order "Dissipation order" STEERABLE=always
{
  1 :: "first order accurate dissipation (using a second derivative)"
  3 :: "third order accurate dissipation (using a fourth derivative)"
} 3

REAL epsdis "Dissipation strength" STEERABLE=always
{
  *:* :: "0 for no dissipation.  Unstable for epsdis<0 and epsdis>1/3"
} 0.2

STRING vars "List of evolved grid functions that should have dissipation added" STEERABLE=always
{
  .* :: "must be a valid list of grid functions"
} ""



# Extra dissipation in horizons

BOOLEAN extra_dissipation_in_horizons "extra dissipation in horizons" STEERABLE=always
{
} "no"

INT update_ah_every "how often to update the AH information for dissipation" STEERABLE=always
{
  0:* :: "positive iteration number"
} 1

REAL ah_slope "Slope inside AH" STEERABLE=always
{
  *:* :: "0 for no dissipation.  Unstable when total epsdis<0 or total epsdis>1/3"
} 0.2

REAL ah_max_epsdis "maximal epsdis" STEERABLE=always
{
  *:* :: "<0 for 'off', >=0 for maximal epsdis in horizon"
} -1.0

INT surface_number[100] "horizon number for extra dissipation in horizons -- SphericalSurface number" STEERABLE=always
{
  -1  :: "do not use a spherical surface"
  0:* :: "surface number (from SphericalSurface); starts from 0"
} -1

INT horizon_number[100] "horizon number for extra dissipation in horizons -- AHFinderDirect number" STEERABLE=always
{
  -1  :: "do not use a horizon"
  1:* :: "horizon number (from AHFinderDirect); starts from 1"
} -1

BOOLEAN respect_emask "respect excision mask" STEERABLE=always
{
} "no"

# Extra dissipation at outer boundary

BOOLEAN extra_dissipation_at_outerbound "increase dissipation at outer boundary" STEERABLE=always
{
} "no"

INT outer_bound_npoints "number of points in which dissipation should be increased" STEERABLE=always
{
  0:* :: "positive number"
} 3

REAL ob_slope "slope at outer boundary" STEERABLE=always
{
  0:* :: "increase dissipation"
} 5