Results 101 to 110 of about 72,461 (205)

Small-scale turbulent dynamo for low-Prandtl number fluid: Comparison of the theory with results of numerical simulations

Astronomy & Astrophysics
Context. During the past decades, significant progress has been made in numerical simulations of the turbulent dynamo and the theoretical understanding of turbulence.
Kopyev A. V., Il’yn A. S., Sirota V. A., Zybin K. P.   +3 more
doaj   +1 more source

The Magnetic Helicity Driven Solar-Type Dynamo

Universe
(1) Theoretical studies have shown that large-scale vorticity generates a divergent-type helicity flux associated with small-scale magnetic fluctuations.
Valery V. Pipin
doaj   +1 more source

Magnetic material in mean-field dynamos driven by small scale helical flows

New Journal of Physics, 2014
We perform kinematic simulations of dynamo action driven by a helical small scale flow of a conducting fluid in order to deduce mean-field properties of the combined induction action of small scale eddies.
A Giesecke, F Stefani, G Gerbeth
doaj   +1 more source

Nonlinearity in Turbulent Diffusion as a Possible Cause of Stellar Flares

Astronomy
Extremely powerful flares releasing energy well above 1032 erg are rare compared to the typical manifestations of solar activity, which are already being routinely monitored by the existing Space Weather network—with some level of predictability. However,
Elena Popova
doaj   +1 more source

Magnetic Field Amplification and Reconstruction in Rotating Astrophysical Plasmas: Verifying the Roles of α and β in Dynamo Action

Particles
We investigate the α and β effects in a rotating spherical plasma system relevant to astrophysical contexts. In particular, we focus on how kinetic and magnetic (current) helicities influence the magnetic diffusivity β.
Kiwan Park
doaj   +1 more source

Magnetic Field Signatures of Craters on Mars

Geophysical Research Letters
Craters on Mars are a window into Mars' past and the time they were emplaced. Because the crust is heated and shocked during impact, craters can demagnetize or magnetize the crust depending on the presence or absence of a dynamo field at the time of ...
A. Mittelholz, S. C. Steele, R. R. Fu, C. L. Johnson, R. J. Lillis, G. Stucky de Quay   +5 more
doaj   +1 more source

Quantitative magnetohydrodynamic modelling of flux pumping in ASDEX Upgrade

Nuclear Fusion
The sawtooth-free hybrid scenario has been achieved recently in ASDEX Upgrade (AUG) with applied non-inductive current sources and auxiliary heating (Burckhart et al 2023 Nucl. Fusion 63 126056).
Haowei Zhang, Matthias Hölzl, Isabel Krebs, Andreas Burckhart, Alexander Bock, Sibylle Günter, Valentin Igochine, Karl Lackner, Rohan Ramasamy, Hartmut Zohm, the JOREK Team, the ASDEX Upgrade Team   +11 more
doaj   +1 more source

Methodological Framework for Semiconductor Fab Design Using Dynamo-Based Generative Design

Applied Sciences
The rapid growth of the semiconductor industry has created a bottleneck in which traditional manual methods for designing fabrication plants (fabs) cannot keep pace with their high complexity and short technological lifecycles.
Yeongyu Hwang, WonSeok Choi, Minhyuk Jung, Wonho Cho, Jaewook Lee   +4 more
doaj   +1 more source

How to interpret near-infrared polarisation spectra of active M dwarfs?

Astronomy & Astrophysics
Context. Analyses of global magnetic fields in M dwarfs rely on many approximations regarding the derivation of average line profiles from spectropolarimetric data, interpreting them with analytical functions and modelling them using Zeeman Doppler ...
Kochukhov Oleg
doaj   +1 more source

Turbulent dynamo in the terrestrial magnetosheath. [PDF]

Nat Commun
Vörös Z, Roberts OW, Narita Y, Yordanova E, Nakamura R, Settino A, Schmid D, Volwerk M, Simon Wedlund CL, Varsani A, Sorriso-Valvo L, Bourdin PA, Kis Á.   +12 more
europepmc   +1 more source