{"paper":{"title":"Dynamo regimes and transitions in the VKS experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"A. Chiffaudel (SPEC - URA 2464), B. Dubrulle (SPEC - URA 2464), B. Gallet (LPS), C. Gissinger (LPS), C. Pirat (SPEC - URA 2464), F. Daviaud (SPEC - URA 2464), F. P\\'etr\\'elis (LPS), G. Verhille (Phys-ENS), J. Boisson (SPEC - URA 2464), J.-F Pinton (Phys-ENS), M. Berhanu (LPS), M. Bourgoin (LEGI), N Mordant (LPS), N. Plihon (Phys-ENS), P. Odier (Phys-ENS), S Auma\\^itre (SPEC - URA 2464), S. Fauve (LPS)","submitted_at":"2015-04-15T12:15:29Z","abstract_excerpt":"The Von K{\\'a}rm{\\'a}n Sodium experiment yields a variety of dynamo regimes, when asymmetry is imparted to the flow by rotating impellers at different speed F1 and F2. We show that as the intensity of forcing, measured as F1 + F2, is increased, the transition to a self-sustained magnetic field is always observed via a supercritical bifurcation to a stationary state. For some values of the asymmetry parameter $\\\\theta$ = (F1--F2)/(F1+F2), time dependent dynamo regimes develop. They are observed either when the forcing is increased for a given value of asymmetry, or when the amount of asymmetry "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.03879","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}