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Density inhomogeneities are ubiquitous in space and astrophysical plasmas, particularly at magnetic reconnection sites, shock fronts, and within compressible turbulence. The gradients associated with these inhomogeneous plasma regions serve…

高能天体物理现象 · 物理学 2025-10-22 Ji-Hoon Ha , Elena S. Volnova

This work investigates the short wavelength stability of the magnetopause between a rapidly-rotating, supersonic, dense accretion disc and a slowly-rotating low-density magnetosphere of a magnetized star. The magnetopause is a strong shear…

高能天体物理现象 · 物理学 2015-05-14 R. V. E. Lovelace , M. M. Romanova , W. I. Newman

A two-dimensional lattice Boltzmann model with 19 discrete velocities for compressible Euler equations is proposed (D2V19-LBM). The fifth-order Weighted Essentially Non-Oscillatory (5th-WENO) finite difference scheme is employed to…

软凝聚态物质 · 物理学 2015-05-20 Yanbiao Gan , Aiguo Xu , Guangcai Zhang , Yingjun Li

We report on a three-dimensional MHD numerical experiment of a small scale coronal mass ejection (CME) -like eruption propagating though a non-magnetized solar atmosphere. We find that the Kelvin-Helmholtz instability (KHI) develops at…

太阳与恒星天体物理 · 物理学 2019-10-09 P. Syntelis , P. Antolin

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)…

太阳与恒星天体物理 · 物理学 2023-05-03 Wenzhi Ruan , Limei Yan , Rony Keppens

Magnetospheric Multiscale (MMS) observations of plasma turbulence generated by a Kelvin-Helmholtz (KH) event at the Earth's magnetopause are compared with a high-resolution two-dimensional (2D) hybrid direct numerical simulation (DNS) of…

We performed numerical simulations with the PLUTO code in order to analyze the non-linear behavior of the Kelvin-Helmholtz instability in non-magnetized relativistic fluids. The relevance of the instability at the cosmological QCD phase…

宇宙学与河外天体物理 · 物理学 2018-04-11 V. R. C. Mourão Roque , G. Lugones

Density inhomogeneities are ubiquitous in space and astrophysical plasmas, in particular at contact boundaries between different media. They often correspond to regions that exhibits strong dynamics on a wide range of spatial and temporal…

等离子体物理 · 物理学 2021-08-04 F. Lavorenti , P. Henri , F. Califano , S. Aizawa , N. André

A recent laboratory experiment (Blaauwgeers et al. 2003) suggests that a Kelvin-Helmholtz (KH) instability at the interface between two superfluids, one rotating and anisotropic, the other stationary and isotropic, may trigger sudden…

天体物理学 · 物理学 2009-09-29 A. Mastrano , A. Melatos

In this paper, the coupled Rayleigh-Taylor-Kelvin-Helmholtz instability(RTI, KHI and RTKHI, respectively) system is investigated using a multiple-relaxation-time discrete Boltzmann model. Both the morphological boundary length and…

流体动力学 · 物理学 2022-03-24 Feng Chen , Aiguo Xu , Yudong Zhang , Qingkai Zeng

We study Kelvin-Helmholtz (KH) instability at the interface of a disc and corona system by doing a linear perturbation analysis. The disc is assumed to be thin, however, the corona is considered to be nearly quasispherical because of its…

星系天体物理 · 物理学 2015-05-18 Mohsen Shadmehri , Perikles Rammos

We present two-dimensional particle-in-cell (PIC) simulations of the fully kinetic collisionless magnetorotational instability (MRI) in weakly magnetized (high $\beta$) pair plasma. The central result of this numerical analysis is the…

高能天体物理现象 · 物理学 2018-06-27 Giannandrea Inchingolo , Thomas Grismayer , Nuno F. Loureiro , Ricardo A. Fonseca , Luis O. Silva

We present numerical simulations of the growth and saturation of the Kelvin-Helmholtz instability in a compressible fluid layer with and without a weak magnetic field. In the absence of a magnetic field, the instability generates a single…

天体物理学 · 物理学 2009-11-13 M. L. Palotti , F. Heitsch , E. G. Zweibel , Y. -M. Huang

The stability of the heliopause, the tangential discontinuity separating the solar wind from the interstellar medium, is influenced by various processes, including the Kelvin-Helmholtz instability. This study investigates the role of charge…

太阳与恒星天体物理 · 物理学 2025-06-18 A. V. Titova , S. D. Korolkov , V. V. Izmodenov

The main aim of this submission is to investigate the effects of some parameters like wave number, shear velocity, magnetic field and temperature for the growth rate of the magnetized Kelvin-Helmholtz instability (KHI) with incessant…

太阳与恒星天体物理 · 物理学 2019-08-14 Huseyin Cavus , G. A. Hoshoudy

The magnetorotational instability (MRI) is a fundamental mechanism determining the macroscopic dynamics of astrophysical accretion disks. In collisionless accretion flows around supermassive black holes, MRI-driven plasma turbulence…

We study the evolutionary conditions for Kelvin-Helmholtz (KH) instability in a H-alpha solar surge observed in NOAA AR 8227 on 1998 May 30. The jet with speeds in the range of 45-50 km/s, width of 7 Mm, and electron number density of 3.83…

太阳与恒星天体物理 · 物理学 2016-01-20 I. Zhelyazkov , T. V. Zaqarashvili , R. Chandra , A. K. Srivastava , T. Mishonov

Magnetohydrodynamic kink waves naturally form as a consequence of perturbations to a structured medium, for example transverse oscillations of coronal loops. Linear theory has provided many insights in the evolution of linear oscillations,…

太阳与恒星天体物理 · 物理学 2024-03-26 Andrew Hillier , Iñigo Arregui , Takeshi Matsumoto

The effects of different initial perturbations on the evolution of stratified shear flows that are subject to Kelvin-Helmholtz instability and vortex pairing have been investigated through Direct Numerical Simulation (DNS). The effects of…

流体动力学 · 物理学 2019-06-12 Wenjing Dong , Edmund W. Tedford , Mona Rahmani , Gregory A. Lawrence

The boundaries identification of Kelvin-Helmholtz vortices in observational data has been addressed by searching for single-spacecraft small-scale signatures. A recent hybrid Vlasov-Maxwell simulation of Kelvin-Helmholtz instability has…

空间物理 · 物理学 2021-05-26 A. Settino , D. Perrone , Yu. V. Khotyaintsev , D. B. Graham , F. Valentini