Stability of detonations in the ZND limit

Details Stability of detonations in the ZND limit Stability of detonations in the ZND limit

2009-06-15

arxiv.org/abs/0906.2821v2

Mathematics

Analysis of PDEs

Scientific paper

Confirming a conjecture of Lyng--Raoofi--Texier--Zumbrun, we show that stability of strong detonation waves in the ZND, or small-viscosity, limit is equivalent to stability of the limiting ZND detonation together with stability of the viscous profile associated with the component Neumann shock. More, on bounded frequencies the nonstable eigenvalues of the viscous detonation wave converge to those of the limiting ZND detonation, while on frequencies of order one over viscosity, they converge to one over viscosity times thos of the associated viscous Neumann shock. This yields immediately a number of examples of instability and Hopf bifurcation of reacting Navier--Stokes detonations through the extensive numerical studies of ZND stability in the detonation literature.

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