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Title: Dynamo transition in low-dimensional models
Authors: Σαρρής, Ιωάννης Ε.
Verma, Mahendra K.
Lessinnes, Thomas
Kumar, Krishna
Carati, Daniele
Contributors: Singh, Meenakshi
Item type: Journal article
Keywords: Magnetohydrodynamics;Helicity;Velocity;Prandtl number;Αριθμός Prandtl;Ταχύτητα;Μαγνητοϋδροδυναμική;Ελικότητα
Subjects: Technology
Issue Date: 7-May-2015
Publisher: American Physical Society
Abstract: Two low-dimensional magnetohydrodynamic models containing three velocity and three magnetic modes are described. One of them (nonhelical model) has zero kinetic and current helicity, while the other model (helical) has nonzero kinetic and current helicity. The velocity modes are forced in both these models. These low-dimensional models exhibit a dynamo transition at a critical forcing amplitude that depends on the Prandtl number. In the nonhelical model, dynamo exists only for magnetic Prandtl number beyond 1, while the helical model exhibits dynamo for all magnetic Prandtl number. Although the model is far from reproducing all the possible features of dynamo mechanisms, its simplicity allows a very detailed study and the observed dynamo transition is shown to bear similarities with recent numerical and experimental results.
Language: English
Citation: VERMA, M.K., LESSINNES, T., CARATI, D., SARRIS, I.E., KUMAR, K., et al. (2008). Dynamo transition in low-dimensional models . Physical Review E. [Online] 78 (3). p.036409. Available from:
Journal: Physical Review E
Type of Journal: With a review process (peer review)
Access scheme: Embargo
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
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