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Given • the thermodynamics of the fuel (the fuel's temperature, density and composition) • the ashes exist in their equilibrium state (NSE in the nuclear case) then the ChapmanJouget (1890) detonation solution follows from conservation of momentum, energy, mass, and charge across the flame front. This gives four nonlinear, algebraic conditions whose simultaneous solution is desired. That is, a four dimensional root find is done. The CJ solution tells you the • speed of the detonation • thermodynamics of the ashes The CJ solution doesn't tell you the • width of the fueltoash region • spatial variations of the variables • if the solution is a selfsustaining detonation The instrument in public_cjdet.tbz generates CJ detonation solutions and will also compute the strong and weak detonation solutions in the event that one chooses to drive the detonation at a userspecified Mach number. If you want what the ChapmanJouget solution doesn't tell you, a ZND detonation probably will.



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