Abstract

Direct numerical simulation of airborne blast waves, from source location to long distance, is a challenging task due to the wide range of spatial and temporal scales. Billions of cells are necessary for 3D codes. Taking into account topography, obstacles, and variable atmospheric conditions is further restricting. In this paper we present a simplified model for blast wave propagation designed to obtain reasonably accurate results at low computational cost in the near field. This new model is an extension to blast waves of earlier simplified models for shock propagation. It gives the first arrival time and the overpressure at the front.

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