GASEOUS FLOW ORIGINATED BY A GUNSHOT .1.

The numerical simulation of the gaseous dow originated by a gunshot bo th during the projectile motion within the muzzle and out of it is con sidered. The numerical solution of the Euler equations is obtained via a second order accurate ENO scheme. A special algorithm of cells reor ganization is developed for computing the projectile motion out of the muzzle. It reveals an interesting property of the ENO schemes and Roe 's approximate solution of automatically capturing discontinuities by means of the choice of the corresponding grid velocity. The algorithm developed describes sufficiently well all gasdynamics phenomena which accompany the gunshot.