Investigation of the interaction between competing types of nondiffusive transport in drift wave turbulence

e-Archivo Repository

Show simple item record Ogata, D. Newman, D.E. Sánchez Fernández, Luis Raúl 2022-09-15T10:48:42Z 2022-09-15T10:48:42Z 2017-05
dc.identifier.bibliographicCitation Ogata, D., Newman, D. E., & Sánchez, R. (2017). Investigation of the interaction between competing types of nondiffusive transport in drift wave turbulence. In Physics of Plasmas, 24(5), 052307-052320
dc.identifier.issn 1070-664X
dc.description.abstract Radial transport in turbulence dominated tokamak plasmas has been observed to deviate from classical diffusion in certain regimes relevant for magnetic confinement fusion. These situations at least include near-marginal turbulence, where radial transport becomes superdiffusive and mediated by elongated radial structures (or avalanches) and transport across radially sheared poloidal flows, where radial subdiffusion often ensues. In this paper, the interaction between very different physical ingredients responsible for these two types of nondiffusive dynamics (namely, turbulent profile relaxation close to a local threshold and the interaction with radially sheared zonal flows) is studied in detail in the context of a simple two-dimensional electrostatic plasma fluid turbulence model based on the dissipative trapped electron mode. It is shown that, depending on the relative relevance of each of these ingredients, which can be tuned in various ways, a variety of nondiffusive radial transport behaviors can be found in the system. The results also illustrate the fact that the classical diffusion paradigm is often insufficient to describe turbulent transport in systems with self-generated flows and turbulent profile relaxations. Published by AIP Publishing.
dc.description.sponsorship This work was supported by U.S. DOE under 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 DGICT (Direccion General de Investigaciones Cientıficas y Tecnologicas) of Spain under Project No. ENE2015-68265.
dc.format.extent 13
dc.language.iso eng
dc.publisher AIP Publishing
dc.rights © 2017 Author(s).
dc.subject.other Electron mode turbulence
dc.subject.other Plasma-confinement
dc.subject.other Sheared flow
dc.subject.other Dynamics
dc.subject.other Diffusion
dc.subject.other Tokamaks
dc.subject.other Flux
dc.title Investigation of the interaction between competing types of nondiffusive transport in drift wave turbulence
dc.type article
dc.subject.eciencia Física
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. ENE2015-68265-P
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 052307
dc.identifier.publicationissue 5
dc.identifier.publicationlastpage 052320
dc.identifier.publicationtitle PHYSICS OF PLASMAS
dc.identifier.publicationvolume 24
dc.identifier.uxxi AR/0000020139
dc.contributor.funder Ministerio de Ciencia e Innovación (España)
dc.affiliation.dpto UC3M. Departamento de Ingeniería Telemática
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Aplicaciones y Servicios Telemáticos (GAST)
 Find Full text

Files in this item

*Click on file's image for preview. (Embargoed files's preview is not supported)

This item appears in the following Collection(s)

Show simple item record