  We perform hydrodynamical simulations of core collapse supernovae (CCSNe)
with a cylindrically-symmetrical numerical code (FLASH) to study the inflation
of bubbles and the initiation of the explosion within the frame of the
jittering-jets model. We study the typical time- scale of the model and compare
it to the typical time-scale of the delayed neutrino mechanism. Our analysis
shows that the explosion energy of the delayed neutrino mechanism is an order
of magnitude less than the required 10^51 erg.
