Abstract
A shock wave in gas mixtures, whose composition ahead of the shock includes an inert light main component and two small chemically-interacting admixtures, is numerically modeled. The chemical reaction between the admixtures starts inside the shock front and results in the formation of two new components. A time-dependent statistical Monte Carlo simulation with variable weight factors is used. It is found that within the front the forward reaction rate coefficient exceeds the constant equilibrium value of the corresponding rate coefficient behind the shock by a factor of about 120 (the rate coefficient becomes constant as soon as the molecular velocity distribution is Maxwellian). The reaction is more intense in the translational nonequilibrium zone. It is shown that in the cases of an exothermal reaction and a weak endothermal reaction a very small portion of the light reaction product has the same velocity as the shock and is entrained by the shock front.
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