Normal Shock in a Converging-Diverging Nozzle

This simulator solves the real isentropic-flow and Rankine-Hugoniot shock equations for gas accelerating through a de Laval (converging-diverging) nozzle. Drag the back-pressure ratio and exit area ratio and watch a normal shock wave form inside the diverging section and slide along its length — or vanish entirely once the back pressure drops low enough to push it out of the nozzle. Live readouts report the exit Mach number, the shock's position, and the exit pressure the model computes against your target back pressure, while colored flow particles show the abrupt jump from supersonic to subsonic across the shock front.