Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics
The reduction of turbulent transport across sheared flow regions has been known for a long time in magnetically confined toroidal plasmas. However, details of the dynamics are still unclear, in particular, in what refers to the changes caused by the flow on the nature of radial transport itself. In...
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ftunivcarlosmadr:oai:e-archivo.uc3m.es:10016/36342 2024-01-21T10:03:53+01:00 Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics Ogata, D. Newman, D. E. Sánchez Fernández, Luis Raúl Ministerio de Economía y Competitividad (España) 2017-07 http://hdl.handle.net/10016/36342 https://doi.org/10.1063/1.4993209 eng eng American Institute of Physics Gobierno de España. ENE2015-68265-P Ogata, D., Newman, D. E., & Sánchez, R. (2017). Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics. Physics of Plasmas, 24(7), 072309 1070-664X http://hdl.handle.net/10016/36342 https://doi.org/10.1063/1.4993209 7 (072309) Physics of Plasmas 24 AR/0000020423 © 2017 Author(s). Published by AIP Publishing. open access Física research article AM 2017 ftunivcarlosmadr https://doi.org/10.1063/1.4993209 2023-12-27T00:20:37Z The reduction of turbulent transport across sheared flow regions has been known for a long time in magnetically confined toroidal plasmas. However, details of the dynamics are still unclear, in particular, in what refers to the changes caused by the flow on the nature of radial transport itself. In Paper II, we have shown in a simplified model of drift wave turbulence that, when the background profile is allowed to evolve self-consistently with fluctuations, a variety of transport regimes ranging from superdiffusive to subdiffusive open up depending on the properties of the underlying turbulence [D. Ogata et al., Phys. Plasmas 24, 052307 (2017)]. In this paper, we show that externally applied sheared flows can, under the proper conditions, cause the transport dynamics to be diffusive or subdiffusive. This work was supported by U.S. DOE Contract No. DE-FG02-04ER54741 with the University of Alaska Fairbanks and in part by a grant of HPC resources from the Arctic Region Supercomputing Center at the University of Alaska Fairbanks. This research was also sponsored in part by DGICYT (Dirección General de Investigaciones Científicas y Tecnológicas) of Spain under Project No. ENE2015-68265. Article in Journal/Newspaper Arctic Alaska Universidad Carlos III de Madrid: e-Archivo Arctic Fairbanks Physics of Plasmas 24 7 072309 |
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Open Polar |
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Universidad Carlos III de Madrid: e-Archivo |
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ftunivcarlosmadr |
language |
English |
topic |
Física |
spellingShingle |
Física Ogata, D. Newman, D. E. Sánchez Fernández, Luis Raúl Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics |
topic_facet |
Física |
description |
The reduction of turbulent transport across sheared flow regions has been known for a long time in magnetically confined toroidal plasmas. However, details of the dynamics are still unclear, in particular, in what refers to the changes caused by the flow on the nature of radial transport itself. In Paper II, we have shown in a simplified model of drift wave turbulence that, when the background profile is allowed to evolve self-consistently with fluctuations, a variety of transport regimes ranging from superdiffusive to subdiffusive open up depending on the properties of the underlying turbulence [D. Ogata et al., Phys. Plasmas 24, 052307 (2017)]. In this paper, we show that externally applied sheared flows can, under the proper conditions, cause the transport dynamics to be diffusive or subdiffusive. This work was supported by U.S. DOE Contract No. DE-FG02-04ER54741 with the University of Alaska Fairbanks and in part by a grant of HPC resources from the Arctic Region Supercomputing Center at the University of Alaska Fairbanks. This research was also sponsored in part by DGICYT (Dirección General de Investigaciones Científicas y Tecnológicas) of Spain under Project No. ENE2015-68265. |
author2 |
Ministerio de Economía y Competitividad (España) |
format |
Article in Journal/Newspaper |
author |
Ogata, D. Newman, D. E. Sánchez Fernández, Luis Raúl |
author_facet |
Ogata, D. Newman, D. E. Sánchez Fernández, Luis Raúl |
author_sort |
Ogata, D. |
title |
Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics |
title_short |
Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics |
title_full |
Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics |
title_fullStr |
Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics |
title_full_unstemmed |
Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics |
title_sort |
transport dynamics of self-consistent, near-marginal drift-wave turbulence. i. investigation of the ability of external flows to tune the non-diffusive dynamics |
publisher |
American Institute of Physics |
publishDate |
2017 |
url |
http://hdl.handle.net/10016/36342 https://doi.org/10.1063/1.4993209 |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_relation |
Gobierno de España. ENE2015-68265-P Ogata, D., Newman, D. E., & Sánchez, R. (2017). Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics. Physics of Plasmas, 24(7), 072309 1070-664X http://hdl.handle.net/10016/36342 https://doi.org/10.1063/1.4993209 7 (072309) Physics of Plasmas 24 AR/0000020423 |
op_rights |
© 2017 Author(s). Published by AIP Publishing. open access |
op_doi |
https://doi.org/10.1063/1.4993209 |
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Physics of Plasmas |
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24 |
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7 |
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072309 |
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1788694302235295744 |