Chapman-Jouget Detonations


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Contact: F.X.Timmes
my one page vitae,
full vitae,
research statement, and
teaching statement.

• 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 Chapman-Jouget (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 fuel-to-ash region
• spatial variations of the variables
• if the solution is a self-sustaining 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 user-specified Mach number. If you want what the Chapman-Jouget solution doesn't tell you, a ZND detonation probably will.

detonation speed
why speed is non-monotonic
detonation regimes


Please cite the relevant references if you publish a piece of work that use these codes, pieces of these codes, or modified versions of them. Offer co-authorship as appropriate.