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Experiments and models of MHD jets and their relevance to astrophysics and solar physics

Bellan, Paul M. (2018) Experiments and models of MHD jets and their relevance to astrophysics and solar physics. Physics of Plasmas, 25 (5). Art. No. 055601. ISSN 1070-664X. https://resolver.caltech.edu/CaltechAUTHORS:20180312-093633038

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Abstract

Magnetohydrodynamic (MHD)-driven jets involve poloidal and toroidal magnetic fields, finite pressure gradients, and unbalanced forces. The mechanism driving these jets is first discussed qualitatively by decomposing the magnetic force into a curvature and a gradient component. The mechanism is then considered quantitatively by consideration of all terms in the three components of the MHD equation of motion and in addition, the implications of Ampere's law, Faraday's law, the ideal Ohm's law, and the equation of continuity. The analysis shows that jets are self-collimating with the tip of the jet moving more slowly than the main column of the jet so there is a continuous stagnation near the tip in the jet frame. Experiments supporting these conclusions are discussed and it is shown how this mechanism relates to jets in astrophysical and solar corona contexts.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1063/1.5009571DOIArticle
https://aip.scitation.org/doi/10.1063/1.5009571PublisherArticle
ORCID:
AuthorORCID
Bellan, Paul M.0000-0002-0886-8782
Additional Information:© 2018 Published by AIP Publishing. Received 17 October 2017; accepted 7 December 2017; published online 12 March 2018. This material was based on work supported by the U.S. Department of Energy Office of Science, Office of Fusion Energy Sciences under Award No. DE-FG02–04ER54755, by the National Science Foundation under Award No. 1348393, by the Air Force Office of Scientific Research under Award No. FA9550-11-1-0184, and by the U.S. Department of Energy Advance Research Projects Agency Energy under Award No. DE-AR0000565.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-04ER54755
NSFAGS-1348393
Air Force Office of Scientific Research (AFOSR)FA9550-11-1-0184
Department of Energy (DOE)DE-AR0000565
Subject Keywords:Electronic circuits; Condensed matter properties; Solar atmosphere; Astrophysics; Plasma confinement; Solar physics; Electrohydrodynamics; Electrorheological fluids; Classical electromagnetism; Laboratory procedures
Issue or Number:5
Record Number:CaltechAUTHORS:20180312-093633038
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180312-093633038
Official Citation:Experiments and models of MHD jets and their relevance to astrophysics and solar physics. Paul M. Bellan. Physics of Plasmas 2018 25:5
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85242
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Mar 2018 17:12
Last Modified:03 Oct 2019 19:28

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