Numerical Simulation on Laser Initiation of Thin Explosive

The processes of the laser initiation of pentaerythritol tetranitrate (PETN: density 1.0g/cc) are calculated using one‐dimensional hydrodynamic code to study the effects of the initiation methods on the initiation process. The simplified assumptions for the initial condition are used to model the three types of the initiation method, utilizing direct absorption of laser energy, impact of the laser driven‐flyer plate and ablation of the metal film. The governing equations are Lagrangian conservation equations and are solved by a finite difference method. The reaction rate law is used the ignition and growth model.