2007/02/08 by Erik Spence, Spence, E. J., M. D. Nornberg +11
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #Geomagnetism and Paleomagnetism Studies #Geophysics (physics.geo-ph) #Magnetic and Electromagnetic Effects #Plasma Physics (physics.plasm-ph)
paper · pdf · doi:10.48550/arxiv.physics/0702068
openalex publication_date 2007/02/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The nature of Ohm's law is examined in a turbulent flow of liquid sodium. A magnetic field is applied to the flowing sodium, and the resulting magnetic field is measured. The mean velocity field of the sodium is also measured in an identical-scale water model of the experiment. These two fields are used to determine the terms in Ohm's law, indicating the presence of currents driven by a turbulent electromotive force. These currents result in a diamagnetic effect, generating magnetic field in opposition to the dominant fields of the experiment. The magnitude of the fluctuation-driven magnetic field is comparable to that of the field induced by the sodium's mean flow.