Multiscale smoothed particle hydrodynamics simulation of detonation initiation

Detonation initiation phenomenon in condensed explosives requires the development of multiscale simulation techniques. Contact smoothed particle hydrodynamics is applied for a mesoscopic simulation of shock initiation in a model of porous pentaerythritol tetran-itrate (PETN) at low density. Our simulation of shock initiation leads to an overestimated run distance to detonation compared with Popolato curve in PETN. The consistency of the porous mesoscopic structure simulation, using a contact smoothed particle hydrodynamics and macroscopic kinetics of the pressed PETN is discussed.