Shock dynamics method for focusing of reflected blast waves

The nonlinear focusing of a cylindrical blast wave reflected from a solid concave wall is investigated numerically by a modified CCW method. The results are compared with experimental data from exploding wire experiments and with numerical simulations obtained by a finite difference PLM scheme (Higashino et al. 1987). The agreement of the present method with the PLM results as well as with the measurement is satisfactory, however, the CPU time is 90% less than that required for the PLM simulation.