2D slice through the midplane of the simulation volume along the x- and z-axes for model GCD200 at t = 2.20 s (left panel) and at t = 2.37 s (right panel) with colour-coded temperature. The green contour line displays the position of the deflagration level set; any material enclosed by a green line has been burned in the deflagration. The white contour lines show the density at 10⁷ g cm^-3, 10⁶ g cm^-3, and 10⁵ g cm^-3 (from the centre outwards). The left panel shows the temperature slightly before the detonation is initialised, the right panel the temperature at the time of the initialisation of the detonation. The detonation spot is shown by a magenta circle (right panel).