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Title: Suppression of turbulent resistivity in turbulent Couette flow

Turbulent transport in rapidly rotating shear flow very efficiently transports angular momentum, a critical feature of instabilities responsible both for the dynamics of accretion disks and the turbulent power dissipation in a centrifuge. Turbulent mixing can efficiently transport other quantities like heat and even magnetic flux by enhanced diffusion. This enhancement is particularly evident in homogeneous, isotropic turbulent flows of liquid metals. In the New Mexico dynamo experiment, the effective resistivity is measured using both differential rotation and pulsed magnetic field decay to demonstrate that at very high Reynolds number rotating shear flow can be described entirely by mean flow induction with very little contribution from correlated velocity fluctuations.
Authors:
; ; ; ; ;  [1] ; ;  [2] ;  [3]
  1. New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 (United States)
  2. Los Alamos National Laboratory, Los Alamos, New Mexico 87544 (United States)
  3. University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)
Publication Date:
OSTI Identifier:
22490968
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCRETION DISKS; ANGULAR MOMENTUM; CENTRIFUGES; COUETTE FLOW; FLUCTUATIONS; INSTABILITY; LIQUID METALS; MAGNETIC FIELDS; MAGNETIC FLUX; NEW MEXICO; REYNOLDS NUMBER; ROTATING PLASMA; SHEAR; TURBULENT FLOW