Comparison of density distributions from the test simulations reported in Table A.1 and model W15-IIb-sh-MHD+dec-rl-hr (Table 1). The figure presents 2D slices in the (x, z) plane showing the plasma density distribution in logarithmic scale (left panels), along with 3D volumetric renderings of the ejecta (center panels) and shell (right panels) at the labeled times (see upper left corner in the left panels).