title: Transport coefficients and heat fluxes in non-equilibrium high-temperature flows with electronic excitation
metadata.name: dc.contributor.author
metadata.value: Istomin, V.A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Kustova, E.V.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2017-02-16T12:47:32Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2017-02-16T12:47:32Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2017-02-07
metadata.lang: -
metadata.name: dc.identifier.issn
metadata.value: 1089-7674
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/6010
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The influence of electronic excitation on transport processes in non-equilibrium high-temperature
  ionized mixture flows is studied. Two five-component mixtures, N2/N2+/N/N+/e- and O2/O2+/O/O+/e-, are considered taking into account the electronic degrees of freedom for atomic
  species as well as the rotational-vibrational-electronic degrees of freedom for molecular species,
  both neutral and ionized. Using the modified Chapman-Enskog method, the transport coefficients
  (thermal conductivity, shear viscosity and bulk viscosity, diffusion and thermal diffusion) are calculated
  in the temperature range 500–50 000 K. Thermal conductivity and bulk viscosity coefficients
  are strongly affected by electronic states, especially for neutral atomic species. Shear
  viscosity, diffusion, and thermal diffusion coefficients are not sensible to electronic excitation if
  the size of excited states is assumed to be constant. The limits of applicability for the Stokes relation
  are discussed; at high temperatures, this relation is violated not only for molecular species but
  also for electronically excited atomic gases. Two test cases of strongly non-equilibrium flows
  behind plane shock waves corresponding to the spacecraft re-entry (Hermes and Fire II) are simulated
  numerically. Fluid-dynamic variables and heat fluxes are evaluated in gases with electronic
  excitation. In inviscid flows without chemical-radiative coupling, the flow-field is weakly affected
  by electronic states; however, in viscous flows, their influence can be more important, in particular,
  on the convective heat flux. The contribution of different dissipative processes to the heat transfer
  is evaluated as well as the effect of reaction rate coefficients. The competition of diffusion and heat
  conduction processes reduces the overall effect of electronic excitation on the convective heating,
  especially for the Fire II test case. It is shown that reliable models of chemical reaction rates are of
  great importance for accurate predictions of the fluid dynamic variables and heat fluxes.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: Russian Foundation for Basic Research (Project Nos. 16-38-60009 and 15-08-03371) and Saint Petersburg State University, Project No. 6.37.206.2016.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: American Institute of Physics Publishing
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: 24;022109
metadata.lang: -
metadata.name: dc.subject
metadata.value: Transport coefficients, electronic excitation, plasma
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Transport coefficients and heat fluxes in non-equilibrium high-temperature flows with electronic excitation
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: Printed paper Physics of Plasmas Istomin Kustova.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/6010/1/Printed%20paper%20Physics%20of%20Plasmas%20Istomin%20Kustova.pdf
resources.format: Adobe PDF
resources.description: Published paper
resources.size: 1,81 MB