Concept
Dynamo
Publications associées (39)
The effect of pressure-anisotropy-driven kinetic instabilities on magnetic field amplification in galaxy clusters
Context. The intracluster medium (ICM) is the low-density diffuse gas that fills the space between galaxies within galaxy clusters. It is primarily composed of magnetized plasma, which reaches virial temperatures of up to 10(8) K, probably due to mergers o ...
Edp Sciences S A2024Shedding light on the MRI-driven dynamo in a stratified shearing box
We study the magneto-rotational instability (MRI) dynamo in a geometrically thin disc (H/R < 1) using stratified zero net (vertical) flux shearing box simulations. We find that mean fields and electromotive forces (EMFs) oscillate with a primary frequency ...
2024Dissipative magnetic structures and scales in small-scale dynamos
Small-scale dynamos play important roles in modern astrophysics, especially on galactic and extragalactic scales. Owing to dynamo action, purely hydrodynamic Kolmogorov turbulence hardly exists and is often replaced by hydromagnetic turbulence. Understandi ...
OXFORD UNIV PRESS2023Diffusion-Bonding Between Strands and Modeling of Splices of Nb3Sn Rutherford Cables
Pierluigi Bruzzone, Kamil Sedlák, Nikolay Bykovskiy
Particle accelerators foresee the use of Nb3Sn in the next generation of dipole magnets. A common design strategy is to grade the coil, i.e., to optimize the quantity of superconductor in the turns with respect to the magnetic field intensity. As a consequ ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022Torque Computation With the Isogeometric Mortar Method for the Simulation of Electric Machines
Bernard Kapidani, Rafael Vazquez Hernandez
In this work, isogeometric mortaring is used for the simulation of a six-pole permanent magnet synchronous machine. Isogeometric mortaring is especially well suited for the efficient computation of rotating electric machines, as it allows for an exact geom ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022Inductive Power Transfer System for Auxiliary Power Supply in Medium Voltage Converters
Drazen Dujic, Chengmin Li, Xiaotong Du
Inductive power transfer technology is an attractive solution for medium voltage applications by eliminating the need for high voltage cables or wired connections in general. This paper introduces an inductive power transfer system which has multiple indep ...
2022Topology Optimization For Winding in Electric Motors
Electrical machines consumed the amount of 9’346 TWh in 2019, corresponding to more than 40% of the total global electricity consumption. With the growing demand for automation of production lines and electrification of the transport industry, this value i ...
2022Production of a Chiral Magnetic Anomaly with Emerging Turbulence and Mean-Field Dynamo Action
In relativistic magnetized plasmas, asymmetry in the number densities of left-and right-handed fermions, i.e., a nonzero chiral chemical potential mu(5), leads to an electric current along the magnetic field. This causes a chiral dynamo instability for a u ...
AMER PHYSICAL SOC2022Small-scale organic Rankine cycle turbo-generator for waste heat recovery on truck engine
Truck engine waste heat recovery (WHR) systems have been investigated for many years. Among them, organic Rankine cycle (ORC) systems show the highest potential, but still lack efficient small-scale expansion devices, in practice. Proposed expanders are of ...
EPFL2020