Ion temperature gradient driven turbulence in the weak density gradient limit

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859371· OSTI ID:5773188

Hamaguchi, S; Horton, W ^[1]

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1. Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas (USA)

The anomalous heat transport arising from the ion temperature gradient driven mode or {eta}{sub {ital i}}-mode turbulence is extended to the range of the weak density gradient limit ({eta}{sub {ital i}}={ital L}{sub {ital n}}/{ital L}{sub {ital T}}{r arrow}{infinity}), which is appropriate for H-mode dishcarges. It is shown that the anomalous ion heat conductivity {chi}{sub {ital i}} with {ital L}{sub {ital n}}{r arrow}{infinity} scales as {chi}{sub {ital i}}={ital g}({rho}{sub {ital s}}/{ital L}{sub {ital T}}) ({ital cT}{sub {ital i}}/{ital eB}) exp({minus}{beta}{sigma}) with {sigma}=({ital T}{sub {ital e}}/{ital T}{sub {ital i}}) ({ital L}{sub {ital T}}/{ital L}{sub {ital s}}), {beta}{approx equal}4, and {ital g}{approx equal}1. This {chi}{sub {ital i}} scaling is the natural extension for high {eta}{sub {ital i}} of the scaling of {chi}{sub {ital i}} for {ital K}=({ital T}{sub {ital i}}/{ital T}{sub {ital e}}) (1+{eta}{sub {ital i}}){approx lt}4 obtained (Phys. Fluids B {bold 2}, 1833 (1990)) from analytical and numerical studies.

• DOE Contract Number: FG05-80ET53088
• OSTI ID: 5773188
• Journal Information: Physics of Fluids B; (USA), Journal Name: Physics of Fluids B; (USA) Vol. 2:12; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
700107 -- Fusion Energy-- Plasma Research-- Instabilities
ANALYTICAL SOLUTION
ELECTRON DENSITY
ENERGY TRANSFER
FUNCTIONS
HEAT TRANSFER
ION TEMPERATURE
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
PLASMA
PLASMA DENSITY
SCALING LAWS
SHEAR
SIMULATION
TEMPERATURE GRADIENTS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THREE-DIMENSIONAL CALCULATIONS
TURBULENCE