Results 31 to 40 of about 59,962 (177)
Magnetohydrodynamic Turbulence Formation in Solar Flares: 3D Simulation and Synthetic Observations
The Astrophysical Journal, 2023 Turbulent plasma motion is common in the universe and invoked in solar flares to drive effective acceleration leading to high-energy electrons. Unresolved mass motions are frequently detected in flares from extreme ultraviolet (EUV) observations, which ...
W. Ruan, L. Yan, R. Keppens
doaj +1 more source
Propagation speed, linear stability, and ion acceleration in radially imploding Hall-driven electron-magnetohydrodynamic shocks [PDF]
, 2017 Plasma density gradients are known to drive magnetic shocks in electron-magnetohydrodynamics (EMHD). Previous slab modeling has been extended to cylindrical modeling of radially imploding shocks. The main new effect of the cylindrical geometry is found to be a radial dependence in the speed of shock propagation.
arxiv +1 more source
The $α$ Dynamo Effects in Laboratory Plasmas [PDF]
Magnetohydrodynamics 38, 191 (2002), 2001 A concise review of observations of the $\alpha$ dynamo effect in laboratory plasmas is given. Unlike many astrophysical systems, the laboratory pinch plasmas are driven magnetically. When the system is overdriven, the resultant instabilities cause magnetic and flow fields to fluctuate, and their correlation induces electromotive forces along the mean ...
arxiv +1 more source
Radiative Magnetohydrodynamic Simulation of the Confined Eruption of a Magnetic Flux Rope: Unveiling the Driving and Constraining Forces [PDF]
arXiv, 2023 We analyse the forces that control the dynamic evolution of a flux rope eruption in a three-dimensional (3D) radiative magnetohydrodynamic (RMHD) simulation. The confined eruption of the flux rope gives rise to a C8.5 flare. The flux rope rises slowly with an almost constant velocity of a few km/s in the early stage, when the gravity and Lorentz force ...
arxiv
Development Status and Trends of the ECH Technology for the Magnetic Confinement Fusion
南方能源建设[Introduction] In magnetic confinement fusion research, electron cyclotron heating (ECH) and current drive means are widely implemented for applications including, but not limited to, plasma initiation, heating, non-inductive current drive, and ...
Donghui XIA +3 more
doaj +1 more source
Energy Science &Engineering, EarlyView.Numerical analysis of double‐diffusive convection in a curvilinear cavity with SiO2/H2O nanofluid, focusing on mesh, validation, results, and optimisation. ABSTRACT This paper investigates numerically the effect of MHD and entropy generation on double‐diffusive combined convection in an inclined enclosure filled with Si2O/H2O and heated fins.
Mohammed A. Alomari +6 more
wiley +1 more source
Energy Science &Engineering, EarlyView.ABSTRACT This study investigates double‐diffusive transport and entropy generation in a wavy cylindrical enclosure containing Cu─H2O Casson nanofluid under magnetic field and thermal radiation effects. The governing equations were solved numerically using the finite element method with Galerkin formulation.
Mohammed Azeez Alomari +6 more
wiley +1 more source
Generation of Solenoidal Modes and Magnetic Fields in Turbulence Driven by Compressive Driving [PDF]
, 2020 We perform numerical simulations of hydrodynamic (HD) and magnetohydrodynamic (MHD) turbulence driven by compressive driving to study generation of solenoidal velocity component and small-scale magnetic field. We mainly focus on the effects of mean magnetic field ($B_0$) and the sonic Mach number ($M_s$).
arxiv +1 more source
Quality 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
Tidally driven dynamos in a rotating sphere [PDF]
, 2014 Large-scale planetary or stellar magnetic fields generated by a dynamo effect are mostly attributed to flows forced by buoyancy forces in electrically conducting fluid layers. However, these large-scale fields may also be controlled by tides, as previously suggested for the star $\tau$-boo, Mars or the Early Moon. By simulating a small local patch of a
arxiv +1 more source