Experiments and models of MHD jets and their relevance to astrophysics and solar physics
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.
- Authors:
-
[1]
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Applied Physics and Materials Science
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Science (SC)
- OSTI Identifier:
- 1540139
- Alternate Identifier(s):
- OSTI ID: 1425536; OSTI ID: 1574720
- Grant/Contract Number:
- AR0000565; FG02-04ER54755
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 5; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics
Citation Formats
Bellan, Paul M. Experiments and models of MHD jets and their relevance to astrophysics and solar physics. United States: N. p., 2018.
Web. doi:10.1063/1.5009571.
Bellan, Paul M. Experiments and models of MHD jets and their relevance to astrophysics and solar physics. United States. https://doi.org/10.1063/1.5009571
Bellan, Paul M. Mon .
"Experiments and models of MHD jets and their relevance to astrophysics and solar physics". United States. https://doi.org/10.1063/1.5009571. https://www.osti.gov/servlets/purl/1540139.
@article{osti_1540139,
title = {Experiments and models of MHD jets and their relevance to astrophysics and solar physics},
author = {Bellan, Paul M.},
abstractNote = {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.},
doi = {10.1063/1.5009571},
journal = {Physics of Plasmas},
number = 5,
volume = 25,
place = {United States},
year = {Mon Mar 12 00:00:00 EDT 2018},
month = {Mon Mar 12 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
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Analytic Model for the Time-dependent Electromagnetic Field of an Astrophysical Jet
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