Sketch of our computational domain. The central object and its interaction with the innermost disk are located below the inner boundary at R_d (green region), the near-Keplerian jet-emitting disk (JED) being established from R_d to the end of the domain R_ext. An axial outflow (the spine) is emitted from the central regions (in red) and the jet is emitted from the JED (in blue). The solid purple line represents a recollimation shock surface starting on the axis at a height Z_c. For each point N lying on this surface, we use local poloidal unit vectors (e_⊥, e_∥), respectively perpendicular and parallel to the shock surface. Also, at any point M inside the domain, we either use spherical (e_R,e_θ,e_ϕ) or cylindrical (e_r,e_ϕ,e_z) coordinates.