dorsal/arxiv
View SchemaGeneration of magnetic field by dynamo action in a turbulent flow of liquid sodium
| Authors | R. Monchaux, M. Berhanu, M. Bourgoin, M. Moulin, Ph. Odier, J. -F. Pinton, R. Volk, S. Fauve, N. Mordant, F. Petrelis, A. Chiffaudel, F. Daviaud, B. Dubrulle, C. Gasquet, L. Marie, F. Ravelet |
|---|---|
| Categories | |
| ArXiv ID | physics/0701075 |
| URL | https://arxiv.org/abs/physics/0701075 |
| DOI | 10.1103/PhysRevLett.98.044502 |
Abstract
We report the observation of dynamo action in the VKS experiment, i.e., the generation of magnetic field by a strongly turbulent swirling flow of liquid sodium. Both mean and fluctuating parts of the field are studied. The dynamo threshold corresponds to a magnetic Reynolds number Rm \sim 30. A mean magnetic field of order 40 G is observed 30% above threshold at the flow lateral boundary. The rms fluctuations are larger than the corresponding mean value for two of the components. The scaling of the mean square magnetic field is compared to a prediction previously made for high Reynolds number flows.
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"abstract": "We report the observation of dynamo action in the VKS experiment, i.e., the\ngeneration of magnetic field by a strongly turbulent swirling flow of liquid\nsodium. Both mean and fluctuating parts of the field are studied. The dynamo\nthreshold corresponds to a magnetic Reynolds number Rm \\sim 30. A mean magnetic\nfield of order 40 G is observed 30% above threshold at the flow lateral\nboundary. The rms fluctuations are larger than the corresponding mean value for\ntwo of the components. The scaling of the mean square magnetic field is\ncompared to a prediction previously made for high Reynolds number flows.",
"arxiv_id": "physics/0701075",
"authors": [
"R. Monchaux",
"M. Berhanu",
"M. Bourgoin",
"M. Moulin",
"Ph. Odier",
"J. -F. Pinton",
"R. Volk",
"S. Fauve",
"N. Mordant",
"F. Petrelis",
"A. Chiffaudel",
"F. Daviaud",
"B. Dubrulle",
"C. Gasquet",
"L. Marie",
"F. Ravelet"
],
"categories": [
"physics.flu-dyn"
],
"doi": "10.1103/PhysRevLett.98.044502",
"title": "Generation of magnetic field by dynamo action in a turbulent flow of liquid sodium",
"url": "https://arxiv.org/abs/physics/0701075"
},
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