**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 . 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. When running
2D simulations only one boundary condition is required (radial)
while for the 3D case it is necessary to provide a boundary condition for the colatitude (the layer at the disk surface).
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
at the midplane is automatically used by the code. The vertical boundary condition will be applied at $`\phi =`opening
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
