Abstract
The Stefan-Maxwell relations, in which the concentration gradients are expressed in terms of linear combinations of the diffusion velocities of the components and the thermodynamic parameter gradients, are derived for a partially ionized quasineutral multicomponent two-temperature gas mixture. It is shown that a component of the diffusion driving force proportional to ▿ln(T e /T h ), where T e is the electron temperature and T h is the gas temperature, can develop in the two-temperature mixtures. A generalization of the Fick law for the diffusion ion flow which contains the new thermal diffusion force is obtained for a three-component plasma. Under the assumption that the charged components have no effect on the shock wave structure, for linear approximations of the gas density and temperature profiles in this zone approximate mass ion concentration distributions in a shock wave propagating through weakly ionized argon and ahead of its front are analytically obtained under the condition that the electron temperature is much higher than the gas temperature. Analytic distributions of the ambipolar electric field E a and the ratio E a /n in the ion-sonic wave (extended zone ahead of the shock wave front in the non-isothermal plasma) are obtained.
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Original Russian Text © A.F. Kolesnikov, 2015, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2015, Vol. 50, No. 1, pp. 170–181.
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Kolesnikov, A.F. Stefan-Maxwell relations for ambipolar diffusion in a two-temperature plasma with application to the problem of an ion-sonic wave. Fluid Dyn 50, 153–163 (2015). https://doi.org/10.1134/S0015462815010159
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DOI: https://doi.org/10.1134/S0015462815010159