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On the range of validity of the semirelativistic magnetohydrodynamic equations

Published online by Cambridge University Press:  09 June 2014

Manuel Núñez
Manuel Núñez*
Affiliation:
Sección de Matemáticas and IMUVA, Universidad de Valladolid, 47011 Valladolid, Spain
*
†Email address for correspondence: [email protected]
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Abstract

Plasmas with moderate flow velocity and sound speed, but large Alfvén speed have been described by the semirelativistic magnetohydrodynamics (MHD) equations. While these are correct when restricted to their range of validity, they may have the undesirable effect of predicting unphysical accelerations, much faster than the ones of classical MHD. We present a family of planar models on which the Lorentz force acts more forcefully in the semirelativistic approach, yielding a flow velocity which rapidly exceeds the limits within which the equations are valid.

Type
Papers
Information
Journal of Plasma Physics , Volume 80 , Issue 5 , October 2014 , pp. 697 - 706
Copyright
Copyright © Cambridge University Press 2014 

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