### Abstract

This paper presents a novel, unified approach to the theory of turbulent transport of parallel momentum by collisionless drift waves. The physics of resonant and non‐resonant off‐diagonal contributions to the momentum flux is emphasized, and collisionless momentum exchange between waves and particles is accounted for. Two related momentum conservation theorems are derived. These relate the resonant particle momentum flux, the wave momentum flux and the refractive force. A perturbative calculation, in the spirit of Chapman‐Enskog theory, is used to obtain the wave momentum flux, which contributes significantly to the residual stress. A general equation for mean κ_{∥}(〈κ_{∥}〉) is derived and used to develop a generalized theory of symmetry breaking. The resonant particle momentum flux is calculated, and pinch and residual stress effects are identified. The implications of the theory for intrinsic rotation and momentum transport bifurcations are discussed.

© 2008 American Institute of Physics

Original language | English |
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Journal | Aip Conference Proceedings |

Volume | 1013 |

Pages (from-to) | 76-105 |

ISSN | 0094-243X |

DOIs | |

Publication status | Published - 2008 |

Event | 1st ITER international Summer School - Aix-en-Provence, France Duration: 16 Jul 2008 → 20 Jul 2008 Conference number: 1 http://www.iter.org/newsline/12/1031 |

### Conference

Conference | 1st ITER international Summer School |
---|---|

Number | 1 |

Country | France |

City | Aix-en-Provence |

Period | 16/07/2008 → 20/07/2008 |

Internet address |

### Cite this

*Aip Conference Proceedings*,

*1013*, 76-105. https://doi.org/10.1063/1.2939043

}

*Aip Conference Proceedings*, vol. 1013, pp. 76-105. https://doi.org/10.1063/1.2939043

**Transport of parallel momentum by collisionless drift wave turbulence.** / Diamond, P.H. (Invited author); McDevitt, C.J. (Invited author); Gurcan, O.E. (Invited author); Hahm, T.S. (Invited author); Naulin, Volker (Invited author).

Research output: Contribution to journal › Conference article › Research › peer-review

TY - GEN

T1 - Transport of parallel momentum by collisionless drift wave turbulence

AU - Diamond, P.H.

AU - McDevitt, C.J.

AU - Gurcan, O.E.

AU - Hahm, T.S.

AU - Naulin, Volker

PY - 2008

Y1 - 2008

N2 - This paper presents a novel, unified approach to the theory of turbulent transport of parallel momentum by collisionless drift waves. The physics of resonant and non‐resonant off‐diagonal contributions to the momentum flux is emphasized, and collisionless momentum exchange between waves and particles is accounted for. Two related momentum conservation theorems are derived. These relate the resonant particle momentum flux, the wave momentum flux and the refractive force. A perturbative calculation, in the spirit of Chapman‐Enskog theory, is used to obtain the wave momentum flux, which contributes significantly to the residual stress. A general equation for mean κ∥(〈κ∥〉) is derived and used to develop a generalized theory of symmetry breaking. The resonant particle momentum flux is calculated, and pinch and residual stress effects are identified. The implications of the theory for intrinsic rotation and momentum transport bifurcations are discussed. © 2008 American Institute of Physics

AB - This paper presents a novel, unified approach to the theory of turbulent transport of parallel momentum by collisionless drift waves. The physics of resonant and non‐resonant off‐diagonal contributions to the momentum flux is emphasized, and collisionless momentum exchange between waves and particles is accounted for. Two related momentum conservation theorems are derived. These relate the resonant particle momentum flux, the wave momentum flux and the refractive force. A perturbative calculation, in the spirit of Chapman‐Enskog theory, is used to obtain the wave momentum flux, which contributes significantly to the residual stress. A general equation for mean κ∥(〈κ∥〉) is derived and used to develop a generalized theory of symmetry breaking. The resonant particle momentum flux is calculated, and pinch and residual stress effects are identified. The implications of the theory for intrinsic rotation and momentum transport bifurcations are discussed. © 2008 American Institute of Physics

KW - Energiteknologier på vej

U2 - 10.1063/1.2939043

DO - 10.1063/1.2939043

M3 - Conference article

VL - 1013

SP - 76

EP - 105

JO - A I P Conference Proceedings Series

JF - A I P Conference Proceedings Series

SN - 0094-243X

ER -