Turbulence velocimetry of density fluctuation imaging data

G. R. McKee; R. J. Fonck; D. K. Gupta; D. J. Schlossberg; M. W. Shafer; C. Holland; G. Tynan

doi:10.1063/1.1790043

Turbulence velocimetry of density fluctuation imaging data

G. R. McKee, R. J. Fonck, D. K. Gupta, D. J. Schlossberg, M. W. Shafer, C. Holland, G. Tynan

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

62 Scopus citations

Abstract

Analysis techniques to measure the time-resolved flow field of turbulence are developed and applied to images of density fluctuations obtained with the beam emission spectroscopy diagnostic system on the DIII-D tokamak. Velocimetry applications include measurement of turbulent particle flux, zonal flows, and the Reynolds stress. The flow field of turbulent eddies exhibits quasisteady poloidal flows as well as high-frequency radial and poloidal motion associated with electrostatic potential fluctuations and strongly nonlinear multifield interactions. The orthogonal dynamic programming technique, developed for fluid-based particle and amorphous shape (smoke) flow analysis, is investigated to measure such turbulence flows. Sensitivity and accuracy are assessed and sample results discussed.

Original language	English
Pages (from-to)	3490-3492
Number of pages	3
Journal	Review of Scientific Instruments
Volume	75
Issue number	10 II
DOIs	https://doi.org/10.1063/1.1790043
State	Published - Oct 2004
Externally published	Yes

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10.1063/1.1790043

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title = "Turbulence velocimetry of density fluctuation imaging data",

abstract = "Analysis techniques to measure the time-resolved flow field of turbulence are developed and applied to images of density fluctuations obtained with the beam emission spectroscopy diagnostic system on the DIII-D tokamak. Velocimetry applications include measurement of turbulent particle flux, zonal flows, and the Reynolds stress. The flow field of turbulent eddies exhibits quasisteady poloidal flows as well as high-frequency radial and poloidal motion associated with electrostatic potential fluctuations and strongly nonlinear multifield interactions. The orthogonal dynamic programming technique, developed for fluid-based particle and amorphous shape (smoke) flow analysis, is investigated to measure such turbulence flows. Sensitivity and accuracy are assessed and sample results discussed.",

author = "McKee, {G. R.} and Fonck, {R. J.} and Gupta, {D. K.} and Schlossberg, {D. J.} and Shafer, {M. W.} and C. Holland and G. Tynan",

year = "2004",

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doi = "10.1063/1.1790043",

language = "English",

volume = "75",

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T1 - Turbulence velocimetry of density fluctuation imaging data

AU - McKee, G. R.

AU - Fonck, R. J.

AU - Gupta, D. K.

AU - Schlossberg, D. J.

AU - Shafer, M. W.

AU - Holland, C.

AU - Tynan, G.

PY - 2004/10

Y1 - 2004/10

N2 - Analysis techniques to measure the time-resolved flow field of turbulence are developed and applied to images of density fluctuations obtained with the beam emission spectroscopy diagnostic system on the DIII-D tokamak. Velocimetry applications include measurement of turbulent particle flux, zonal flows, and the Reynolds stress. The flow field of turbulent eddies exhibits quasisteady poloidal flows as well as high-frequency radial and poloidal motion associated with electrostatic potential fluctuations and strongly nonlinear multifield interactions. The orthogonal dynamic programming technique, developed for fluid-based particle and amorphous shape (smoke) flow analysis, is investigated to measure such turbulence flows. Sensitivity and accuracy are assessed and sample results discussed.

AB - Analysis techniques to measure the time-resolved flow field of turbulence are developed and applied to images of density fluctuations obtained with the beam emission spectroscopy diagnostic system on the DIII-D tokamak. Velocimetry applications include measurement of turbulent particle flux, zonal flows, and the Reynolds stress. The flow field of turbulent eddies exhibits quasisteady poloidal flows as well as high-frequency radial and poloidal motion associated with electrostatic potential fluctuations and strongly nonlinear multifield interactions. The orthogonal dynamic programming technique, developed for fluid-based particle and amorphous shape (smoke) flow analysis, is investigated to measure such turbulence flows. Sensitivity and accuracy are assessed and sample results discussed.

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DO - 10.1063/1.1790043

M3 - Article

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VL - 75

SP - 3490

EP - 3492

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 10 II

ER -

Turbulence velocimetry of density fluctuation imaging data

Abstract

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