**FargOCA** will then invoke those boundaries condition at predefined place in the code.
The computational grid has one ghost layer in the radial and in the vertical direction . Periodic conditions are applied in the azimuthal direction. When running
The computational grid has one ghost layer in the radial and in the vertical direction . Periodic conditions are applied in the azimuthal direction. The aim of boundary
condition is to assign values to the ghost layers for the whole set of hydro dynamical quantities.
When running
2D simulations only one boundary condition is required (radial)
while for the 3D case it is necessary to provide a boundary condition also for the colatitude (to be applied to the set of gridcells having $`\phi =`$ Opening and $`\phi =\pi -`$ Opening).
When a 3D simulation is done by considering only one disk hemisphere (in case of vertical symmetry) a suited mirror boundary
is automatically introduced at disk midplane. The vertical boundary condition will be then applied only to the gridcells having $`\phi =`$ Opening.
The aim of boundary
condition is to provide a value for the whole set of hydrodynamical
quantities into the ghost layers.
Possible boundaries are:
1.``open`` valid both for 2D and 3D disc. An open boundary will
let the gas flowing out at the innermost and outermost radial
