Non-dimensional scaling of turbulence characteristics and turbulent diffusivity

被引：102

作者：

McKee, GR ^{[1
]}

Petty, CC ^{[1
]}

Waltz, RE ^{[1
]}

Fenzi, C ^{[1
]}

Fonck, RJ ^{[1
]}

Kinsey, JE ^{[1
]}

Luce, TC ^{[1
]}

Burrell, KH ^{[1
]}

Baker, DR ^{[1
]}

Doyle, EJ ^{[1
]}

Garbet, X ^{[1
]}

Moyer, RA ^{[1
]}

Rettig, CL ^{[1
]}

Rhodes, TL ^{[1
]}

Ross, DW ^{[1
]}

Staebler, GM ^{[1
]}

Sydora, R ^{[1
]}

Wade, MR ^{[1
]}

机构：

[1] Univ Wisconsin, Madison, WI 53706 USA

来源：

NUCLEAR FUSION | 2001年 / 41卷 / 09期

关键词：

D O I：

10.1088/0029-5515/41/9/312

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Plasma turbulence characteristics. including radial correlation lengths, decorrelation times. amplitude profile and flow velocity, have been measured during a rho* scan oil DIII-D while all other transport, relevant dimensionless quantities (e.g., beta, nu* kappa, q, T-e/T-i) are field nearly constant. The turbulence is measured by examining the correlation properties of the local long wavelength (k(perpendicular to)rho (i) less than or equal to 1) density fluctuations, measured with beam emission spectroscopy. The radial correlation length of the turbulence L-c,L-r is shown to scale with the local ion gyroradius, L-c,L-r approximate to 5 rho (i) while the decorrelation times scale with the local acoustic velocity as tau (c) similar to a/c(s). The turbulent diffusivity parameter, D similar to (L-c, r(2)/tau (c)), scales in a roughly gyro-Bohm-like fashion, as predicted by the gyrokinetic equations governing turbulent transport. The experimental one fluid power balance heat diffusivity scaling and that front GLF23 modelling compare reasonably well.

引用

页码：1235 / 1242

页数：8

共 20 条

[1] THEORY OF HYDRODYNAMIC TRAPPED-ION-TEMPERATURE-GRADIENT-DRIVEN TURBULENCE [J].