One-dimensional radial profiles of velocity, gas density, temperature, and corundum density, showing the formation of a new dust cloud (appearing in the upper right quadrant of Fig. 3). The colors (red, orange, green, and blue) mark the four time steps selected in Figs. 2 and 3, the black lines show intermediate snapshots, 1.75  ×   10⁶ s (20.3 d) apart. The sharp drop in temperature from 10 000 to about 4000 K marks the transition from the convection-dominated interior to the shock-dominated atmosphere.