نتایج جستجو برای: magnetohydrodynamics mhd

تعداد نتایج: 11145  

Journal: :Discrete and Continuous Dynamical Systems-series B 2022

<p style='text-indent:20px;'>In this paper, we define a renormalized dissipative measure-valued (rDMV) solution of the compressible magnetohydrodynamics (MHD) equations with non-monotone pressure law. We prove existence rDMV solutions and establish suitable relative energy inequality. And obtain weak (measure-valued)-strong uniqueness property help inequality.</p>

Journal: :Frontiers in Astronomy and Space Sciences 2023

High-resolution global magnetohydrodynamics (MHD) simulations include both meso- and global-scale processes occurring at the magnetopause, which interact to determine time-dependent orientation of day-side x-line (DXL). This study demonstrates that DXL in GAMERA MHD varies on a time scale minutes during steady southward interplanetary magnetic field conditions. behavior manifests observational ...

Journal: :Frontiers in Astronomy and Space Sciences 2023

The predictions of plasma parameters in the interplanetary medium are core space weather forecasts, and magnetohydrodynamics (MHD) numerical simulation is an important tool prediction parameters. Operational forecasts commonly produced by a heliosphere model whose inner boundary set at 18 R s or beyond. Such typically use empirical/physics-based conditions to solve MHD equations for simulation....

2008
Tetsuya Shiromizu

The feature of the spectrum of primordial magnetic field is studied by using renormalization group analysis in magnetohydrodynamics. Taking account of the renormalized resistivity at the fixed point, we show that the scaling of the typical scale with time obeys L(t) ∼ t2/5 for random initial condition. The magnetic fields observed in the various astrophysical scales[1] is one of the important p...

Journal: :AIP Advances 2023

The stability of the n = 1 resistive wall modes (RWMs) dominated by pressure-driven infernal components is investigated using ideal magnetohydrodynamics (MHD) code AEGIS for advanced tokamak scenarios. Here, toroidal mode number. In scenarios, due to large fraction bootstrap current contribution, profile safety factor q deeply reversed in magnetic shear central core region and locally flattened...

2013
Tongfei Guo Shuqiang Wang Roman Samulyak

Sharp Interface Algorithm for Large Density Ratio Incompressible Multiphase Magnetohydrodynamic Flows Report Title A numerical algorithm and the corresponding paralleled implementation for the study of magnetohydrodynamics (MHD) of large density ratio, three-dimensional multiphase flows at low magnetic Reynolds numbers have been developed. The algorithm employs the method of front tracking for ...

Journal: :J. Comput. Physics 2007
Ming-Jiu Ni Ramakanth Munipalli Neil B. Morley Peter Huang Mohamed A. Abdou

A consistent, conservative and accurate scheme has been designed to calculate the current density and the Lorentz force by solving the electrical potential equation for magnetohydrodynamics (MHD) at low magnetic Reynolds numbers and high Hartmann numbers on a finite-volume structured collocated grid. In this collocated grid, velocity (u), pressure (p), and electrical potential (u) are located i...

2005
L. C. Garcia de Andrade

Bi-metricity and Hawking radiation are exhibit in non-relativistic moving magnetohydrodynamics (MHD) plasma medium generating two Riemannian effective spacetimes. The first metric is a flat metric although the speed of ”light” is given by a time dependent signal where no Hawking radiation or effective black holes are displayed. This metric comes from a wave equation which the scalar function co...

2016
MAKOTO TAKAMOTO ALEXANDRE LAZARIAN

In this Letter, we report compressible mode effects on relativistic magnetohydrodynamic (RMHD) turbulence in Poynting-dominated plasmas using 3-dimensional numerical simulations. We decomposed fluctuations in the turbulence into 3 MHD modes (fast, slow, and Alfvén) following the procedure mode decomposition in (Cho & Lazarian 2002), and analyzed their energy spectra and structure functions sepa...

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