Related Experiment Video
Updated: Aug 14, 2026

Ultrasound Velocity Measurement in a Liquid Metal Electrode
Published on: August 5, 2015
Statistics of active versus passive advections in magnetohydrodynamic turbulence
Thomas Gilbert1, Dhrubaditya Mitra
1Institut Non-Linéaire de Nice, CNRS, Université de Nice, 1361 Route des Lucioles, 06560 Valbonne, France. thomas.gilbert@inln.cnrs.fr
Abstract:
Active turbulent advection is considered in the context of magnetohydrodynamics. In this case, an auxiliary passive field bears no apparent connection to the active field. The scaling properties of the two fields are different. In the framework of a shell model, we show that the two-point structure function of the passive field has a unique zero mode, characterizing the scaling of this field only. In other words, the existence of statistical invariants for the decaying passive field carries no information on the scaling properties of the active field.
Related Concept Videos
Laminar and Turbulent Flow
Divergence and Curl of Magnetic Field
Potential Due to a Magnetized Object
The vector...
Ampere's Law in Matter
The differential form of Ampere's law in vacuum states that the curl of the magnetic field equals the permeability times the current density. In a magnetized material, the law is modified to incorporate the free and bound current...
Magnetostatic Boundary Conditions
Magnetic Damping
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...

