Time sequences of density, radial velocity, entropy, and temperature for slices through the center of model st28gm06n038 (rows 1–4), and the variation of relative surface intensity (bottom row). The snapshots are about 2 months apart (see the counter in the top of the panels). Colored lines in the middle row indicate the radial ray used in Fig. 4, following the emergence of a new dust cloud. The contour lines in the temperature panels at 1500 and1150 K roughly correspond to the inner edges of the corundum and silicate dust layers, respectively (see Fig. 6).