Although delayed detonation models of thermonuclear explosions of white dwarfs seem promising for reproducing Type Ia supernovae, the transition of the flame propagation mode from subsonic deflagration to supersonic detonation remains hypothetical. A potential instant for this transition to occur is the onset of the distributed burning regime, i.e. the moment when turbulence first affects the i...

Commonly available nonconventional energetic materials such as H2O2, ammonium nitrates (AN), and reactive materials (e.g., mixtures of metals and metal oxides), as well as conventional plastic explosives primarily made of pentaerythritol tetranitrate (PETN), cyclotrimethylene trinitramine (RDX), cyclotetramethylene-tetranitramine (HMX), and triaminotrinitrobenzene (TATB), are often subjected to...

Pulse detonation technology has the potential to revolutionise both in-atmosphere and space flight. Having an engine capable of running efficiently at Mach 5 will not only allow for faster, more efficient intercontinental travel, but will also change the way spacecrafts are launched. The preset paper discuss about the applications of Pulse detonation engines and different possible variants of the

The progenitors of Type Ia Supernovae (SNe Ia) are still unknown, despite significant progress during the last years in theory and observations. Violent mergers of two carbon–oxygen (CO) white dwarfs (WDs) are one candidate suggested to be responsible for at least a significant fraction of normal SNe Ia. Here, we simulate the merger of two CO WDs using a moving-mesh code that allows for the inc...

explosion has always been regarded as one of the most complicated engineering problems. as a result, many engineers have preferred rather simplified empirical approaches in comparison to extremely complex deterministic analyses. in this paper, however, a numerical simulation based on the combined finite/discrete element methodology is presented for analyzing the dynamic behavior of fracturing r...

An ultra-fine, sub-micron discrete grid is used to capture the unsteady dynamics of a one-dimensional detonation in an inviscid O − O2 − O3 mixture. The ultra-fine grid is necessary to capture the length scales revealed by a complementary analysis of the steady detonation wave structure. For the unsteady calculations, shock-fitting coupled with a high order spatio-temporal discretization scheme...