Výsledky vyhledávání - "Andrievsky, Alexander"

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

Autor: Andrievsky, Alexander, Chertovskih, Roman, Zheligovsky, Vladislav

Publikováno v: Phys. Rev. E 99, 033204 (2019)

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 o

Externí odkaz: http://arxiv.org/abs/1811.00859

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Negative magnetic eddy diffusivity due to oscillogenic $\alpha$-effect

Autor: Andrievsky, Alexander, Chertovskih, Roman, Zheligovsky, Vladislav

Publikováno v: Physica D: Nonlinear Phenomena, Volume 399, 2019, Pages 58-72

We study large-scale kinematic dynamo action of steady mirror-antisymmetric flows of incompressible fluid, that involve small spatial scales only, by asymptotic methods of the multiscale stability theory. It turns out that, due to the magnetic $\alph

Externí odkaz: http://arxiv.org/abs/1711.02390

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Akademický článek

Development of an Ontology for Smart Distributed Energy Systems *

Autor: Nepsha, Fedor S., Nebera, Alexei A., Andrievsky, Alexander A., Krasilnikov, Mikhail I.

Publikováno v: In IFAC PapersOnLine 2022 55(9):454-459

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Negative magnetic eddy diffusivities from test-field method and multiscale stability theory

Autor: Andrievsky, Alexander, Brandenburg, Axel, Noullez, Alain, Zheligovsky, Vladislav

Publikováno v: Astrophysical J., vol. 811, 135, 2015

The generation of large-scale magnetic field in the kinematic regime in the absence of an alpha-effect is investigated by following two different approaches, namely the test-field method and multiscale stability theory relying on the homogenisation t

Externí odkaz: http://arxiv.org/abs/1501.04465

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