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Long Mean Free Path Modifications of Electron Heat Conduction
Author(s) -
Catto Peter J.,
Yeoh KimEe
Publication year - 1998
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150380131
Subject(s) - collisionality , mean free path , physics , electron , thermal conduction , path (computing) , condensed matter physics , free electron model , conductivity , thermodynamics , plasma , quantum mechanics , tokamak , computer science , programming language
The Spitzer‐Härm parallel electron heat conductivity begins to fail even at surprisingly large values of collisionality because the energy squared dependence of the mean free path results in contributions from electrons not satisfying the short mean free path expansion. Self‐similar solutions of model problems are employed to demonstrate that exponentially small, non‐expandable modifications that cannot be retained in conventional treatments are the cause of the departure of heat transport from its Spitzer‐Härm value.