Total density (left), 1.6 nm dust-grain-ratio variations (middle), and 12 μm dust-grain-ratio variation maps in the xz-plane for different resolutions: 128³ (top), 256³ (middle) and 512³ (bottom). The dust variation is given relative to the initial dust ratio value and is shown in logarithmic scale. The red colour shows dust-ratio enhancement while blue means a dust-ratio decrease. The arrows represent the barycentric velocity (left), and the 1.6 nm (middle) and 12 μm dust-grain (right) velocity vectors in the plane. All plots are made at a time corresponding to 2t_cross.