Abstract
In this paper, we study the propagation of sound waves and the dynamics of local wave disturbances induced by spontaneous internal fluctuations in a reactive mixture. We consider a non-diffusive, non-heat conducting and non-viscous mixture described by an Eulerian set of evolution equations. The model is derived from the kinetic theory in a hydrodynamic regime of a fast chemical reaction. The reactive source terms are explicitly computed from the kinetic theory and are built in the model in a proper way. For both time-dependent problems, we first derive the appropriate dispersion relation, which retains the main effects of the chemical process, and then investigate the influence of the chemical reaction on the properties of interest in the problems studied here. We complete our study by developing a rather detailed analysis using the Hydrogen–Chlorine system as reference. Several numerical computations are included illustrating the behavior of the phase velocity and attenuation coefficient in a low-frequency regime and describing the spectrum of the eigenmodes in the small wavenumber limit.
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Communicated by Andreas Öchsner.
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Ramos, M.P., Ribeiro, C. & Soares, A.J. Modeling and analysis of time-dependent processes in a chemically reactive mixture. Continuum Mech. Thermodyn. 30, 127–144 (2018). https://doi.org/10.1007/s00161-017-0591-9
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DOI: https://doi.org/10.1007/s00161-017-0591-9