Results 51 to 60 of about 2,051 (189)

MHD Heat Transfer Enhancement in a Curvilinear Enclosure With Oscillating Wall and Nano‐Encapsulated PCM: A Fluid‐Structure Interaction Analysis

open access: yesHeat Transfer, EarlyView.
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]

open access: yesThe Astrophysical Journal, 2002
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

open access: yesThe Astrophysical Journal Supplement Series
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

open access: yesThe Astrophysical Journal, 2023
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

open access: yesphysica status solidi (RRL) – Rapid Research Letters, EarlyView.
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]

open access: yesAstronomy & Astrophysics, 2013
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

Novel Calibration Strategy for Kalman Filter‐Based Measurement Fusion Operation to Enhance Aging Monitoring

open access: yesQuality and Reliability Engineering International, EarlyView.
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]

open access: yesAnnales Geophysicae, 2011
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

open access: yesSmall, EarlyView.
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

open access: yesThe Astrophysical Journal
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

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