Abstract
A direct numerical simulation of the two-dimensional unsteady compressible Navier-Stokes equations is performed in order to compute the sound field generated by a high-amplitude infrasonic source in a realistic stratified atmosphere and in the presence of a stratospheric wind. Nonlinear distortion as well as wind convection effects on the stratospheric arrivals recorded at ground level are investigated and discussed. Finally, a comparison with infrasonic signals collected from the vapour cloud explosion which occurred at Buncefield, UK, in 2005, is also carried out.
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