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Interaction of large scale flow structures with gyrokinetic turbulence
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McMillan, B. F., Hill, P. (Peter), Bottino, A., Jolliet, S., Vernay, T. and Villard, L.. (2011) Interaction of large scale flow structures with gyrokinetic turbulence. Physics of Plasmas, Vol.18 (No.11). p. 112503. ISSN 1070-664X
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Official URL: http://dx.doi.org/10.1063/1.3656947
Abstract
Shear flows have a profound influence on turbulence-driven transport in tokamaks. The introduction of arbitrary initial flow profiles into the code ORB5 [Jolliet, Comput. Phys. Commun. 177, 409 (2007)] allows the convenient study of how flows on all length scales both influence transport levels and self-consistently evolve. A formulation is presented which preserves the canonical structure of the background particle distribution when either toroidal or poloidal flows are introduced. Turbulence suppression is possible above a certain shearing rate magnitude for homogeneous shear flows, and little evolution of the shearing rate is seen. However, when a flow with a zone boundary, where the shearing rate reverses at mid-radius, is introduced, the shear flow evolves substantially during the simulation. E x B shear flows with a zone boundary of a positive sign decay to a saturation amplitude, consistent with the well known saturation of turbulently generated zonal flows. Unlike the E x B flow, the parallel flows relax diffusively.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Library of Congress Subject Headings (LCSH): | Turbulence -- Mathematical models, Shear flow -- Mathematical models, Tokamaks |
| Journal or Publication Title: | Physics of Plasmas |
| Publisher: | American Institute of Physics |
| ISSN: | 1070-664X |
| Date: | November 2011 |
| Volume: | Vol.18 |
| Number: | No.11 |
| Page Range: | p. 112503 |
| Identification Number: | 10.1063/1.3656947 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| References: | [1] S. Jolliet, A. Bottino, P. Angelino, R. Hatzky, T. Tran, B. McMillan, O. Sauter, K. Appert, Y. Idomura, and L. Villard, Computer Physics Communications 177, 409 (2007). [2] A. G. Peeters, D. Strintzi, Y. Camenen, C. Angioni, F. J. Casson, W. A. Hornsby, and A. P. Snodin, Physics of Plasmas 16, 042310 (2009). [3] P. Angelino, A. Bottino, R. Hatzky, S. Jolliet, O. Sauter, T. Tran, and L. Villard, Physics of Plasmas 13, 052304 (2006). [4] J. Kinsey, R. Waltz, and J. Candy, Physics of Plasmas 12, 062302 (2005). [5] B. McMillan, S. Jolliet, T. Tran, A. Bottino, A. P., and L. Villard, Physics of Plasmas 15, 052308 (2008). [6] R. Waltz, R. Dewar, and X. Garbet, Physics of Plasmas 5, 1784 (1998). [7] F. J. Casson, A. G. Peeters, Y. Camenen, W. A. Hornsby, A. P. Snodin, D. Strintzi, and G. Szepesi, Physics of Plasmas 16, 092303 (2009). [8] B. McMillan, S. Jolliet, T. Tran, A. Bottino, A. P., and L. Villard, Physics of Plasmas 16, 022310 (2009). [9] P. Diamond and T. Hahm, Physics of Plasmas 2, 3640 (1995). [10] M. N. Rosenbluth and F. L. Hinton, Phys. Rev. Lett. 80, 724 (1998). [11] A. M. Dimits, G. Bateman, M. A. Beer, B. I. Cohen, W. Dorland, G. W. Hammett, C. Kim, J. E. Kinsey, M. Kotschenreuther, A. H. Kritz, et al., Physics of Plasmas 7, 969 (2000). [12] B. N. Rogers, W. Dorland, and M. Kotschenreuther, Phys. Rev. Lett. 85, 5336 (2000). [13] A. Dimits, B. Cohen, W. Nevins, and D. Shumaker, Nuclear Fusion 41, 1725 (2001). [14] Y. Idomura, H. Urano, N. Aiba, and S. Tokuda, Nuclear Fusion 49, 065029 (2009). |
| URI: | http://wrap.warwick.ac.uk/id/eprint/41952 |
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