Density distributions in the (x, 0, z) plane at different simulation times for a spherically symmetric explosion (left panel) and for model Fe-R5-D750-V6 of Table 1 (right panel). From top left clockwise: t = 10, t = 100, t = 1000 and t = 5000 yr from the explosion. The units in the color bars are g cm⁻³ logarithmically scaled. The color-coded density scale is shown close to each quadrant. We highlight the different scales used in each quadrant for both the density and the distance along the axis. Right panel: the contours enclose the computational cells consisting of the original anisotropy material by more than 50% (solid line) and 10% (dotted line). See also online Movie 1 and 2 for an animated version.