Self-consistent, nonlocal electron heat flux at arbitrary ion charge number

Sanmartín Losada, Juan Ramón and Ramírez, J. and Fernández-Feria, Rafael and Minotti, F. (1992). Self-consistent, nonlocal electron heat flux at arbitrary ion charge number. "Physics of fluids B", v. 4 (n. 11); pp. 3579-3585. ISSN 0899-8221.

Description

Title: Self-consistent, nonlocal electron heat flux at arbitrary ion charge number
Author/s:
  • Sanmartín Losada, Juan Ramón
  • Ramírez, J.
  • Fernández-Feria, Rafael
  • Minotti, F.
Item Type: Article
Título de Revista/Publicación: Physics of fluids B
Date: 1992
Volume: 4
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A single, nonlocal expression for the electron heat flux, which closely reproduces known results at high and low ion charge number 2, and “exact” results for the local limit at all 2, is derived by solving the kinetic equation in a narrow, tail-energy range. The solution involves asymptotic expansions of Bessel functions of large argument, and (Z-dependent)order above or below it, corresponding to the possible parabolic or hyperbolic character of the kinetic equation; velocity space diffusion in self-scattering is treated similarly to isotropic thermalization of tail energies in large Z analyses. The scale length H characterizing nonlocal effects varies with Z, suggesting an equal dependence of any ad hoc flux limiter. The model is valid for all H above the mean-free path for thermal electrons.

More information

Item ID: 21553
DC Identifier: http://oa.upm.es/21553/
OAI Identifier: oai:oa.upm.es:21553
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 09 Nov 2013 13:01
Last Modified: 21 Apr 2016 12:12
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