[Users] 2D configuration with Carpet

[Erik Schnetter]

Miguel

Apparently you do need to keep requesting 3 ghost zones. This won't extend
the grid since you still have 0 boundary zones.

-erik

On Wed, Feb 14, 2018 at 10:21 AM, Miguel Zilhão <
miguel.zilhao.nogueira at tecnico.ulisboa.pt> wrote:

> 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/C
> arpet/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 at aei.mpg.de wrote:
>
>>
>>
>> On 13 Feb 2018, at 06:19, Miguel Zilhão <miguel.zilhao.nogueira at tecnic
>>> o.ulisboa.pt <mailto:miguel.zilhao.nogueira at 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
>>
>>


-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/
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