title: Turbulent diamagnetism in flowing liquid sodium.
abstract: 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.
authors.affiliation: Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA.
authors.forename: E J
authors.initials: EJ
authors.lastname: Spence
authors.forename: M D
authors.initials: MD
authors.lastname: Nornberg
authors.forename: C M
authors.initials: CM
authors.lastname: Jacobson
authors.forename: C A
authors.initials: CA
authors.lastname: Parada
authors.forename: N Z
authors.initials: NZ
authors.lastname: Taylor
authors.forename: R D
authors.initials: RD
authors.lastname: Kendrick
authors.forename: C B
authors.initials: CB
authors.lastname: Forest