Heat flux viscosity in collisional magnetized plasmas
Abstract
Momentum transport in collisional magnetized plasmas due to gradients in the heat flux, a “heat flux viscosity,” is demonstrated. Even though no net particle flux is associated with a heat flux, in a plasma there can still be momentum transport owing to the velocity dependence of the Coulomb collision frequency, analogous to the thermal force. This heatflux viscosity may play an important role in numerous plasma environments, in particular, in strongly driven highenergydensity plasma, where strong heat flux can dominate over ordinary plasma flows. The heat flux viscosity can influence the dynamics of the magnetic field in plasmas through the generalized Ohm's law and may therefore play an important role as a dissipation mechanism allowing magnetic field line reconnection. The heat flux viscosity is calculated directly using the finitedifference method of Epperlein and Haines [Phys. Fluids 29, 1029 (1986)], which is shown to be more accurate than Braginskii's method [S. I. Braginskii, Rev. Plasma Phys. 1, 205 (1965)], and confirmed with onedimensional collisional particleincell simulations. The resulting transport coefficients are tabulated for ease of application.
 Authors:

 Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
 Princeton University, Princeton, New Jersey 08544 (United States)
 Publication Date:
 OSTI Identifier:
 22410343
 Resource Type:
 Journal Article
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070664X
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COLLISIONS; COMPUTERIZED SIMULATION; COULOMB FIELD; ENERGY DENSITY; FINITE DIFFERENCE METHOD; HEAT FLUX; MAGNETIC FIELDS; PARTIAL DIFFERENTIAL EQUATIONS; PARTICLES; PLASMA; PLASMA DENSITY; VISCOSITY
Citation Formats
Liu, C., Email: cliu@pppl.gov, Fox, W., Bhattacharjee, A., and Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543. Heat flux viscosity in collisional magnetized plasmas. United States: N. p., 2015.
Web. doi:10.1063/1.4918941.
Liu, C., Email: cliu@pppl.gov, Fox, W., Bhattacharjee, A., & Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543. Heat flux viscosity in collisional magnetized plasmas. United States. doi:10.1063/1.4918941.
Liu, C., Email: cliu@pppl.gov, Fox, W., Bhattacharjee, A., and Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543. Fri .
"Heat flux viscosity in collisional magnetized plasmas". United States. doi:10.1063/1.4918941.
@article{osti_22410343,
title = {Heat flux viscosity in collisional magnetized plasmas},
author = {Liu, C., Email: cliu@pppl.gov and Fox, W. and Bhattacharjee, A. and Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543},
abstractNote = {Momentum transport in collisional magnetized plasmas due to gradients in the heat flux, a “heat flux viscosity,” is demonstrated. Even though no net particle flux is associated with a heat flux, in a plasma there can still be momentum transport owing to the velocity dependence of the Coulomb collision frequency, analogous to the thermal force. This heatflux viscosity may play an important role in numerous plasma environments, in particular, in strongly driven highenergydensity plasma, where strong heat flux can dominate over ordinary plasma flows. The heat flux viscosity can influence the dynamics of the magnetic field in plasmas through the generalized Ohm's law and may therefore play an important role as a dissipation mechanism allowing magnetic field line reconnection. The heat flux viscosity is calculated directly using the finitedifference method of Epperlein and Haines [Phys. Fluids 29, 1029 (1986)], which is shown to be more accurate than Braginskii's method [S. I. Braginskii, Rev. Plasma Phys. 1, 205 (1965)], and confirmed with onedimensional collisional particleincell simulations. The resulting transport coefficients are tabulated for ease of application.},
doi = {10.1063/1.4918941},
journal = {Physics of Plasmas},
issn = {1070664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}