convergent-divergent nozzle

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    convergent-divergent nozzle in OpenRocket

    In a compressible flow, when a fluid flows through a convergent nozzle, the fluid increases its speed; But when the fluid arrives at 1 mach speed, the convergent nozzle will desacelerate the fluid, but a divergent nozzle will acelerate the fluid. I would like to know if the software OpenRocket...