Interplay between fluctuation driven toroidal axisymmetric flows and resistive ballooning mode turbulence

H Seto; X. Q. Xu; Benjamin Daniel Dudson; M. Yagi

doi:10.1063/1.5086998

Interplay between fluctuation driven toroidal axisymmetric flows and resistive ballooning mode turbulence

H Seto, X. Q. Xu, Benjamin Daniel Dudson, M. Yagi

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

An interplay between fluctuation driven toroidal axisymmetric flows (convective cell modes) and resistive ballooning mode turbulence after the pedestal collapse is numerically studied by a four-field reduced MHD model in BOUT++ framework. The strong flow shear suppresses the radial transport of pressure filaments and the pressure profile in the pedestal region is partially recovered. As a result, a secondary instability is quasi-linearly excited, which yields a secondary collapse. The subsequent damped oscillation is also analysed by phase diagram analysis.

Original language	English
Article number	052507
Number of pages	15
Journal	Physics of Plasmas
Volume	26
DOIs	https://doi.org/10.1063/1.5086998
Publication status	Published - 14 May 2019

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10.1063/1.5086998

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Cite this

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title = "Interplay between fluctuation driven toroidal axisymmetric flows and resistive ballooning mode turbulence",

abstract = "An interplay between fluctuation driven toroidal axisymmetric flows (convective cell modes) and resistive ballooning mode turbulence after the pedestal collapse is numerically studied by a four-field reduced MHD model in BOUT++ framework. The strong flow shear suppresses the radial transport of pressure filaments and the pressure profile in the pedestal region is partially recovered. As a result, a secondary instability is quasi-linearly excited, which yields a secondary collapse. The subsequent damped oscillation is also analysed by phase diagram analysis.",

author = "H Seto and Xu, {X. Q.} and Dudson, {Benjamin Daniel} and M. Yagi",

year = "2019",

month = may,

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journal = "Physics of Plasmas",

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AU - Seto, H

AU - Xu, X. Q.

AU - Dudson, Benjamin Daniel

AU - Yagi, M.

PY - 2019/5/14

Y1 - 2019/5/14

N2 - An interplay between fluctuation driven toroidal axisymmetric flows (convective cell modes) and resistive ballooning mode turbulence after the pedestal collapse is numerically studied by a four-field reduced MHD model in BOUT++ framework. The strong flow shear suppresses the radial transport of pressure filaments and the pressure profile in the pedestal region is partially recovered. As a result, a secondary instability is quasi-linearly excited, which yields a secondary collapse. The subsequent damped oscillation is also analysed by phase diagram analysis.

AB - An interplay between fluctuation driven toroidal axisymmetric flows (convective cell modes) and resistive ballooning mode turbulence after the pedestal collapse is numerically studied by a four-field reduced MHD model in BOUT++ framework. The strong flow shear suppresses the radial transport of pressure filaments and the pressure profile in the pedestal region is partially recovered. As a result, a secondary instability is quasi-linearly excited, which yields a secondary collapse. The subsequent damped oscillation is also analysed by phase diagram analysis.

U2 - 10.1063/1.5086998

DO - 10.1063/1.5086998

M3 - Article

SN - 1070-664X

VL - 26

JO - Physics of Plasmas

JF - Physics of Plasmas

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