Pointwise vanishing velocity helicity of a flow does not preclude magnetic field generation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Andrievsky, A (Autor) Outra; Chertovskih, R (Autor) FEUP; Zheligovsky, V (Autor) Outra

Revista

Título: Physical review. E

Vol. 99

ISSN: 2470-0045

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 4 Citações

Outras Informações

ID Authenticus: P-00Q-9JT

DOI: 10.1103/physreve.99.033204

Abstract (EN): Pointwise zero velocity helicity density is shown not to prevent steady flows from acting as kinematic dynamos. We present numerical evidences that such flows can generate both small-scale magnetic fields as well as, by the magnetic alpha-effect or negative eddy diffusivity mechanisms, large-scale ones. The flows are constructed as curls of analytically defined space-periodic steady solenoidal flows, whose vorticity helicity (i.e., kinetic helicity) density is everywhere zero.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9