Ionizing shocks in argon. Part II: Transient and multi-dimensional effects
Abstract
We extend the computations of ionizing shocks in argon to the unsteady and multi-dimensional, using a collisional-radiative model and a single-fluid, two-temperature formulation of the conservation equations. It is shown that the fluctuations of the shock structure observed in shock-tube experiments can be reproduced by the numerical simulations and explained on the basis of the coupling of the nonlinear kinetics of the collisional-radiative model with wave propagation within the induction zone. The mechanism is analogous to instabilities of detonation waves and also produces a cellular structure commonly observed in gaseous detonations. We suggest that detailed simulations of such unsteady phenomena can yield further information for the validation of nonequilibrium kinetics.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 01, 2011
- Source ID
- 10.1063/1.3585694
Entities
People
- J.-l. Cambier
- M. G. Kapper
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory