Related Experiment Video
Updated: Aug 13, 2026

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
Published on: July 19, 2016
Saturated state of the nonlinear small-scale dynamo
A A Schekochihin1, S C Cowley, S F Taylor
1Plasma Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BW, United Kingdom. as629@damtp.cam.ac.uk
Abstract:
We consider the problem of incompressible, forced, nonhelical, homogeneous, and isotropic MHD turbulence with no mean magnetic field and large magnetic Prandtl number. This type of MHD turbulence is the end state of the turbulent dynamo, which generates folded fields with small-scale direction reversals. We propose a model in which saturation is achieved as a result of the velocity statistics becoming anisotropic with respect to the local direction of the magnetic folds. The model combines the effects of weakened stretching and quasi-two-dimensional mixing and produces magnetic-energy spectra in remarkable agreement with numerical results at least in the case of a one-scale flow. We conjecture that the statistics seen in numerical simulations could be explained as a superposition of these folded fields and Alfvén-like waves that propagate along the folds.
Related Concept Videos
Faraday Disk Dynamo
Magnetostatic Boundary Conditions
Differential Form of Maxwell's Equations
Linear Approximation in Frequency Domain
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear.
Linear Approximation in Time Domain
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length, the...
Simplified Synchronous Machine Model
In this model, each generator is connected to a...

