hi Ian,

many thanks for the parameter file. this allowed me to go a little further (i was missing CoordBase::boundary_shiftout_z_lower = 1 and CoordBase::boundary_shiftout_z_upper = 1).
however, i'm still getting the following error:

ERROR from host meurglysIII process 0
  while executing schedule bin (none), routine (no thorn)::(no routine)
  in thorn Carpet, file ./Cactus/arrangements/Carpet/Carpet/src/SetupGH.cc:2512:
  -> There are not enough ghost zones for the desired spatial prolongation order on map 0, refinement level 0.  With a spatial prolongation order of 5, you need at least 3 ghost zones.

i'm setting:

Carpet::prolongation_order_space        = 5
Carpet::prolongation_order_time         = 2

driver::ghost_size_x                 = 3
driver::ghost_size_y                 = 3
driver::ghost_size_z                 = 0

i'm guessing that in the example you provided things worked because you only had one grid? is there any way of doing this with more inner levels?

thanks,
Miguel

On 14/02/18 22:25, ian.hinder@aei.mpg.de wrote:

On 13 Feb 2018, at 06:19, Miguel Zilhão <miguel.zilhao.nogueira@tecnico.ulisboa.pt <mailto:miguel.zilhao.nogueira@tecnico.ulisboa.pt>> wrote:

hi Erik,

thanks for your reply. i've tried to set the parameters as you described, but i'm getting a Carpet
assertion failure:

cactus_Lean_ET: Cactus/arrangements/Carpet/CarpetLib/src/gh.cc:61 <http://gh.cc:61/>: gh::gh(const

std::vector<vect<int, 3> >&, centering, int, centering, const std::vector<std::vector<bbox<int, 3> >

&, const i2vect&): Assertion `all(box.shape() / box.stride() >= boundary_width[0] +

boundary_width[1])' failed.

here's how i'm specifying my grid:

CoordBase::xmin                      = -48.00
CoordBase::ymin                      = -48.00
CoordBase::zmin                      =   0.00
CoordBase::xmax                      = +48.00
CoordBase::ymax                      = +48.00
CoordBase::zmax                      =  +0.00
CoordBase::dx                        =   2.00
CoordBase::dy                        =   2.00
CoordBase::dz                        =   2.00

driver::ghost_size_x                 = 3
driver::ghost_size_y                 = 3
driver::ghost_size_z                 = 0

CoordBase::boundary_size_x_lower     = 3
CoordBase::boundary_size_y_lower     = 3
CoordBase::boundary_size_z_lower     = 0
CoordBase::boundary_size_x_upper     = 0
CoordBase::boundary_size_y_upper     = 0
CoordBase::boundary_size_z_upper     = 0

CoordBase::boundary_shiftout_x_lower = 0
CoordBase::boundary_shiftout_y_lower = 0
CoordBase::boundary_shiftout_z_lower = 0

am i missing something?

Hi Miguel,

There is an example parameter file in Kranc, for a true 2D Laplace equation (i.e. it doesn't take derivatives in the z direction):

https://github.com/ianhinder/Kranc/blob/master/Examples/laplace.par

I have not tried this recently, but it worked at one point.

--
Ian Hinder
http://members.aei.mpg.de/ianhin