Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...284..629b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 2, p. 629-636
Astronomy and Astrophysics
Astrophysics
4
Conductive Heat Transfer, Electric Current, Electrohydrodynamics, Heat Flux, Plasma Interactions, Temperature Effects, Coulomb Potential, Enthalpy, Mathematical Models, Ohms Law
Scientific paper
We develop a simple model of saturated heat conduction in which the zero current requirement is satisfied. The electron distribution function is considered to be the sum of a spatially dependent low temperature nearly Maxwellian component and a spatially dependent much higher temperature nearly Maxwellian component. The low temperature component is of a much higher density than the high temperature component. We give explicit requirements that must be met for the model to be appropriate. If the electrons in the cold medium cannot provide the adequate return current, hot electrons are confined by electrostatic forces to a surface layer thinner than their mean free path. In that case the conductive flux depends not only on the conditions of the hotter medium, but also on those of the colder ones.
Bandiera Rino
Chen Yafeng
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