### Abstract

Parallel viscosity ⟨B⋅∇⋅Πi⟩ as a function of radial electric field Er (or, equivalently, nonequilibrium poloidal rotation) in a tokamak
is studied using a five-dimensional (5D) (3D in configuration space and
2D in velocity space) Monte Carlo particle following code. It is shown
that including the poloidal density variation changes the qualitative
behavior of the solution causing the parallel viscosity to change sign when the Mach number Mp=|Er/vtBθ| is of the order of unity. Here, vt is the thermal velocity and Bθ is the poloidal magnetic field.

Original language | English |
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Pages (from-to) | 5255-5258 |

Journal | Physics of Plasmas |

Volume | 7 |

DOIs | |

Publication status | Published - 2000 |

MoE publication type | A1 Journal article-refereed |

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## Cite this

Kiviniemi, T., Heikkinen, J., & Peeters, A. G. (2000). Effect of poloidal density variation on parallel viscosity for large Mach numbers.

*Physics of Plasmas*,*7*, 5255-5258. https://doi.org/10.1063/1.1321014