Simulation of blast waves interaction for multiple cloud explosion

In this work, to study the overpressure distribution characteristics for multiple cloud explosion, we carried out a numerical simulation using LS-DYNA of the process of blast waves interaction for four non-circular cross-section clouds, with the computational results verified and compared with experimental data. Furthermore, based on our analysis of the peak overpressure located from 0 m to 20 m in the vertical direction and the processes of blast-waves interaction in the central area, we obtained the variation of the overpressure close to the ground versus the horizontal distances in four directions including 0°, 90°, 135° and 180°. Our results show that three blast waves occur in sequence over the central ground area, and there exists an increasingly higher pressure towards the central area. In the 45° vertical section, blast waves consist of incident wave, reflection wave and Mach wave.