Pseudo-color slices of entropy at four postbounce times for s27 f _heat 1.05 3D. The color map and limits are indicated on the left and kept fixed for each time. Convection is already strong by 100 ms, as is indicated in Figures 11 and  12. As explosion sets in (right two panels), the convection becomes volume filling and large, high-entropy bubbles emerge that push the shock outward. The explosion begins in an asymmetrical fashion (rightmost panel). The development of convection in our simulations is very similar to that of Ott et al. (2013).