incinerated by the detonation wave, after the deflagration already has burned $\sim 0.5 M_{\odot}$. The incinerated mass and nuclear energy release in the deflagration stage of the O-DDT model are smaller than the C-DDT model. The detonation wave, however, burns a larger amount of material and produces a larger amount of nuclear energy in the O-DDT model than in the C-DDT model. The final incinerated mass and the kinetic energy in the O-DDT model are comparable to those in the W7 model. Hereafter, we discuss how these results can be understood in terms of the flame propagation and the DDT. Note that the nuclear energy release in the hydrodynimic simulations (with a simplified treatment for the nuclear reactions) and that in the detailed reaction network calculations are consistent within 5%.

Figures 1 – 3 show the distribution of selected species at 10 seconds after the ignition of the deflagration flame. At this time, burning has ceased and the SN material is already almost in a homologous expansion. The C-DEF model (Fig. 1) shows large-scale mixing, and thus it does not possess a clearly layered structure as predicted in exactly spherical 1D models (e.g., W7). A large amount of unburned carbon 