Experiments on the magnetorotational instability in helical magnetic fields

Abstract

The magnetorotational instability (MRI) plays a key role in the formation of stars and black holes, by enabling outward angular momentum transport in accretion disks. The use of combined axial and azimuthal magnetic fields allows the investigation of this effect in liquid metal flows at moderate Reynolds and Hartmann numbers. A variety of experimental results is presented showing evidence for the occurrence of the MRI in a Taylor-Couette flow using the liquid metal alloy GaInSn.

15 pages, 13 figures, submitted to New Journal of Physics

References in corpus (15)

• Linear Analysis of the Hall Effect in Protostellar Disks
• The Balbus-Hawley instability in weakly ionised discs
• Hydrodynamic turbulence cannot transport angular momentum effectively in astrophysical disks
• Experimental observation and characterization of the magnetorotational instability
• Experimental evidence for magnetorotational instability in a helical magnetic field
• New type of magneto-rotational instability in cylindrical Taylor-Couette flow
• Helical Magnetorotational Instability in Magnetized Taylor-Couette Flow
• The linear MHD Taylor-Couette instability for liquid sodium
• Turbulence in differentially rotating flows What can be learned from the Couette-Taylor experiment
• Numerical and Experimental Investigation of Circulation in Short Cylinders
• The traveling wave MRI in cylindrical Taylor-Couette flow: comparing wavelengths and speeds in theory and experiment
• The stability of MHD Taylor-Couette flow with current-free spiral magnetic fields between conducting cylinders
• End-effects in rapidly rotating cylindrical Taylor-Couette flow
• Hydromagnetic Instability in Differentially Rotating Flows
• Nonlinear simulations of magnetic Taylor-Couette flow with current-free helical magnetic fields

Cited by in corpus (26)

• Helical magnetorotational instability in a Taylor-Couette flow with strongly reduced Ekman pumping
• Magnetohydrodynamic experiments on cosmic magnetic fields
• Astrophysical turbulence modeling
• Non-axisymmetric Magnetorotational Instabilities in Cylindrical Taylor-Couette Flow
• Experimental evidence for non-axisymmetric magnetorotational instability in a rotating liquid metal exposed to an azimuthal magnetic field
• Observation of magnetocoriolis waves in a liquid metal Taylor-Couette experiment
• Local instabilities in magnetized rotational flows: A short-wavelength approach
• Stability and instability of hydromagnetic Taylor-Couette flows
• Observation of a Free-Shercliff-Layer Instability in Cylindrical Geometry
• On the relation of standard and helical magnetorotational instability
• Absolute versus convective helical magnetorotational instability in a Taylor-Couette flow
• A unifying picture of helical and azimuthal MRI, and the universal significance of the Liu limit
• The Ekman-Hartmann layer in MHD Taylor-Couette flow
• Inviscid helical magnetorotational instability in cylindrical Taylor-Couette flow
• Magneto--Coriolis waves in a spherical Couette flow experiment
• Theory of current instability experiments in magnetic Taylor-Couette flows
• Numerical Study of the Magnetorotational Instability in Princeton MRI Experiment
• Noise-Sustained Convective Instability in a Magnetized Taylor-Couette Flow
• A heuristic model for MRI turbulent stresses in Hall MHD
• Fully nonlinear mode competitions in magnetised Taylor-Couette flow
• Quasi-two-dimensional nonlinear evolution of helical magnetorotational instability in a magnetized Taylor-Couette flow
• Mini-conference on angular momentum transport in laboratory and nature
• Pseudo--magnetorotational instability in a Taylor-Dean flow between electrically connected cylinders
• Magnetic field dynamos and magnetically triggered flow instabilities
• High-speed standard magneto-rotational instability
• Liquid metal experiments on the helical magnetorotational instability