Science and Technology of Energetic Materials

Vol.75, No.4 (2014)

Research paper

Numerical simulations on flow visualization of blast wave/water wall interaction
Yuta Sugiyama, Tomotaka Homae, Kunihiko Wakabayashi, Tomoharu Matsumura, and Yoshio Nakayama


We developed a multicomponent flow method for three fluids based on a five-equation model by Allaire et al. This paper numerically models the experimental results of Homae et al. in order to reveal the effect of a barrier material on a blast wave. Three fluids are considered in the present study : the detonation products, water and air, modeled by Jones-Wilkins-Lee (JWL), stiffened gas and ideal gas equations of state, respectively. A water wall was used to encircle a spherical pentolite of 100 g, and the interface problem between the water wall and the blast wave was investigated. To elucidate the effect of the water wall, we conducted two numerical simulations ; one without a water wall and the other with a water wall 100 mm in radius. The peak overpressure, positive impulse and pressure history all agreed well with the experimental results of Homae et al. ; thus, our new method is applicable to real explosion phenomena involving multiple fluids. We focused on the interaction of the blast wave with two fluid interfaces (detonation products/water and water/air). Due to the repetitions of reflection and transmission of shock waves at the interfaces, weak shock waves were generated. They reached and affected the propagation of blast wave.

> Full text (Open access*)


numerical simulation, multicomponent flow, blast wave, water wall

© Copyright 1999-2017 Japan Explosives Society. All right reserved.