Results 51 to 60 of about 2,051 (189)
ABSTRACT Thermal management systems integrating phase change materials face challenges in maximizing heat transfer efficiency for electronics cooling and energy storage applications. This study addresses the research gap regarding fluid‐structure interaction and magnetohydrodynamic effects on nano‐encapsulated PCM performance in complex geometries.
Mohammed Azeez Alomari+4 more
wiley +1 more source
Three‐dimensional Magnetohydrodynamic Simulations of Spherical Accretion [PDF]
We present three-dimensional numerical magnetohydrodynamic simulations of radiatively inefficient spherical accretion onto a black hole. The simulations are initialized with a Bondi flow, and with a weak, dynamically unimportant, large-scale magnetic field. The magnetic field is amplified as the gas flows in.
Ramesh Narayan+2 more
openaire +5 more sources
A Coscaling Grid for Athena++. II. Magnetohydrodynamics
We extend the coscaling formalism of Habegger & Heitsch implemented in Athena++ to magnetohydrodynamics. The formalism relies on flow symmetries in astrophysical problems involving expansion, contraction, and center-of-mass motion. The formalism is fully
Fabian Heitsch, Roark Habegger
doaj +1 more source
Constraining Circumgalactic Turbulence with QSO Absorption Line Measurements
Our knowledge of the circumgalactic medium (CGM) is mostly based on quasar absorption line measurements. These have uncovered a multiphase medium that is likely highly turbulent, but constraints of this turbulence are limited to measurements of the ...
Brad Koplitz+2 more
doaj +1 more source
Magnetic Hopfions as Local Rotations of the Uniform Magnetization Background
The Hopf mapping of 3D coordinate space to the unit sphere m2 = 1 in the magnetization space m(r) can be parametrized by some angles. These angles are used to define a local rotation matrix to restore the hopfion magnetization configuration from the uniformly magnetized state for any Hopf indices.
Konstantin Y. Guslienko
wiley +1 more source
Magnetohydrodynamic simulations of the ejection of a magnetic flux rope [PDF]
Context. Coronal mass ejections (CME’s) are one of the most violent phenomena found on the Sun. One model to explain their occurrence is the flux rope ejection model. In this model, magnetic flux ropes form slowly over time periods of days to weeks. They then lose equilibrium and are ejected from the solar corona over a few hours. The contrasting time
Pagano, Paolo+2 more
openaire +4 more sources
ABSTRACT This study introduces a novel calibration strategy for the linear Kalman filter (LKF) fusion application in condition monitoring, specifically utilizing accelerated aging data. Unlike the existing literature that often focuses on complex nonlinear Kalman filter variants, this research delves into the calibration of LKF.
Emre Genis, Duygu Bayram Kara
wiley +1 more source
On large plasmoid formation in a global magnetohydrodynamic simulation [PDF]
Abstract. We investigate plasmoid formation in the magnetotail using the global magnetohydrodynamic (MHD) simulation GUMICS-4. Here a plasmoid implies a major reconfiguration of the magnetotail where a part of the tail plasma sheet is ejected downstream, in contrast to small Earthward-propagating plasmoids.
Pekka Janhunen+6 more
openaire +4 more sources
Untangling the Mechanisms in Magneto‐Electrocatalytic Oxygen Evolution
Magnetic fields can enhance the oxygen evolution reaction in electrocatalytic water‐splitting for green‐H2. Yet, commercialization cannot be realized until the underlying magneto‐electric mechanisms are understood. This work uses reactor orientation to untangle these mechanisms. Lorentz force is shown to control metallic plates, while spin‐polarization
Amy Radford+9 more
wiley +1 more source
How Switchbacks Can Maintain a Longer Time in the Interplanetary Space
Parker Solar Probe, the closest spacecraft to the Sun, has renewed our understanding of the solar corona and the interplanetary space. One of its important findings is the prevalence of switchbacks, which display localized magnetic reversals along the ...
Y. Yang, W. Su, P. F. Chen
doaj +1 more source