We build in this paper a numerical solution procedure to compute the flow induced by spherical flame expanding from point source at constant expansion velocity, with an instantaneous chemical reaction. The is supposed be self-similar and split three zones: inner zone composed of burnt gases rest, intermediate where regular initial atmosphere fresh rest. bounded reactive shock (inner side) so-ca...

The hydrodynamic stability of deflagration and detonation bubbles for a first order electroweak and QCD phase transition has been discussed recently with the suggestion that detonations are stable. We examine here the case of a detonation more carefully. We find that in front of the bubble wall perturbations do not grow with time, but behind the wall modes exist which grow exponentially. We bri...

The tunnel is one of the most important components in modern underground engineering. Due to long and narrow shape constraints, it very easily results large-scale fire explosion when deflagration caused by accidents vehicles that transport dangerous goods tunnel. Previously, studies on damage lining high-temperature impacts these kinds disasters were often limited a discussion only influencing ...

Abstract. A numerical method is presented for the treatment of one-dimensional compressible flames. The method consists of a conservative front tracking algorithm for use near the flame and a high-order finite difference scheme for capturing the hvdrodynamics throughout the rest of the domain. The results presented show that the method effectively models the interaction of gas dynamics with bot...

Abstract This paper analyzes A.K. Oppenheim’s original works on the transition of deflagration to detonation and reviews them from perspective new numerical experimental results recently obtained such phenomena. Particular attention is focused processes happening in boundary layer tube walls ahead accelerating flame. The theoretical analyses temperature variations inside developing are presente...

Previous works (Daubech et al., 2019) were dedicated to gaseous flame acceleration along long pipes with a set of cases studied both experimentally and numerically. In these cases, the flammable mixture was initially quiescent homogenously distributed. The impact tube diameter material trough approaches for rather slow flames, fuel being methane. While main features real recovered by chosen CFD...