Numerical simulation of multicomponent inductive plasma flows under chemical non-equilibrium
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This contribution presents an elegant and efficient numerical model of a multi-component inductive plasma under chemical nonequilibrium, The plasma is modeled by a finite number of species. Chemical reactions are taken into account by Arrhenius-type source terms. The plasma thermodynamic properties are computed from statist.ical mechanics, The plasma transport properties are computed with the method of Chapman and Enskog, Multi-component species diffusive fluxes are obtained from the full Stefan-Maxwell equations by means of a straightforward iterative procedure, in which no distinction needs to be made between electrons and heavy particles, The governing equations are discretized in a second order accurate cell-centered finite volume manner on a collocated mesh. The discretized system of equations is solved with a damped Newton method. Powerful Krylov subspace methods are used to efficiently solve the linear systems arising from the Newton linearization, Results are presented for a five-species nitrogen plasma, The effect of chemical non-equilibrium is investigated at various pressures. Though some problems still need to be addressed, good convergence is already found, Calculations of eleven-species air plasmas under thermochemical non-equilibrium seem feasible for the near future.
Citationvanden Abeele, D. [et al.]. Numerical simulation of multicomponent inductive plasma flows under chemical non-equilibrium. "Annals of the New York Academy of Sciences", 6 Febrer 1999, vol. 891, p. 340-347.