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Whether or not smooth solutions to the 3D compressible magnetohydrodynamic (MHD) equations without magnetic diffusion are always global in time remains an extremely challenging open problem. No global well-posedness or stability result is…

偏微分方程分析 · 数学 2023-07-19 Jiahong Wu , Xiaoping Zhai

It is well known that helical magnetohydrodynamic (MHD) turbulence exhibits an inverse transfer of magnetic energy from small to large scales, which is related to the approximate conservation of magnetic helicity. Recently, several…

等离子体物理 · 物理学 2023-05-24 Andres Armua , Arjun Berera , Jaime Calderon Figueroa

In this paper, we consider an inverse problem for a time-fractional diffusion equation with a nonlinear source. We prove that the considered problem is ill-posed, i.e. the solution does not depend continuously on the data. The problem is…

偏微分方程分析 · 数学 2019-10-09 Tran Bao Ngoc , Nguyen Huy Tuan , Mokhtar Kirane

In this paper, we obtain the uniqueness of the 2D MHD equations, which fills the gap of recent work \cite{1} by Chemin et al.

偏微分方程分析 · 数学 2015-03-13 Renhui Wan

Magnetohydrodynamics (MHD) describes the interaction between electrically conducting fluids and electromagnetic fields. We propose and analyze a symplectic, second-order algorithm for the evolutionary MHD system in Els\"asser variables. We…

数值分析 · 数学 2025-07-18 Zhen Yao , Catalin Trenchea , Wenlong Pei

This paper is concerned with existence of solutions to the incompressible non-resistive viscous magnetohydrodynamic (MHD) equations with large initial perturbations in there-dimensional (3D) periodic domains (in Lagrangian coordinates).…

偏微分方程分析 · 数学 2021-11-19 Fei Jiang , Song Jiang

This paper deals with the local existence and uniqueness results for the solution of fractional differential equations with Hilfer-Hadamrd fractional derivative. Using Picard's approximations and generalizing the restrictive conditions…

经典分析与常微分方程 · 数学 2017-06-02 D B Dhaigude , Sandeep P Bhairat

The paper is devoted to the study of a singularly perturbed fractional Schr\"{o}dinger equations involving critical frequency and critical growth in the presence of a magnetic field. By using variational methods, we obtain the existence of…

偏微分方程分析 · 数学 2016-06-29 Zhang Binlin , Marco Squassina , Zhang Xia

Axisymmetric resistive MHD simulations for radially self-similar initial conditions are performed, using the NIRVANA code. The magnetic diffusivity could occur in outflows above an accretion disk, being transferred from the underlying disk…

太阳与恒星天体物理 · 物理学 2015-05-13 Miljenko Cemeljic , Jose Gracia , Nektarios Vlahakis , Kanaris Tsinganos

This paper is concerned with the asymptotic behaviors of global strong solutions to the incompressible non-resistive viscous magnetohydrodynamic (MHD) equations with large initial perturbations in two-dimensional periodic domains in…

偏微分方程分析 · 数学 2021-02-16 Fei Jiang , Song Jiang

We present the basic equations for stationary, incompressible resistive MHD flows in two dimensions. This leads to a system of differential equations for two flux functions, one elliptic partial differential equation (Grad-Shafranov-like)…

天体物理学 · 物理学 2009-11-11 Dieter H. Nickeler , Hans-Joerg Fahr

In this paper, we provide a more accurate description of the evolution of the magnetic flux redistribution during prestellar core collapse by including resistive terms in the magnetohydrodynamics (MHD) equations. We focus more particularly…

太阳与恒星天体物理 · 物理学 2016-02-17 Jacques Masson , Gilles Chabrier , Patrick Hennebelle , Neil Vaytet , Benoit Commerçon

This paper concerns the Cauchy problem of the nonhomogeneous incompressible magnetohydrodynamic (MHD) equations on the whole two-dimensional (2D) space with vacuum as far field density. In particular, the initial density can have compact…

偏微分方程分析 · 数学 2015-06-17 Boqiang Lv , Zhonghai Xu , Xin Zhong

We propose and analyze a class of finite element methods for the time-dependent incompressible magnetohydrodynamics system based on $H(\mathrm{curl})$-conforming discretizations for both the velocity and the magnetic field. This choice is…

数值分析 · 数学 2026-04-08 Lourenço Beirão da Veiga , Sergio Gómez , Ilaria Perugia , Enrico Zampa

This paper establishes explicit solutions for fractional diffusion problems on bounded domains. It also gives stochastic solutions, in terms of Markov processes time-changed by an inverse stable subordinator whose index equals the order of…

概率论 · 数学 2016-04-22 Boris Baeumer , Tomasz Luks , Mark M. Meerschaert

In this paper, we investigate the well-posedness and the long-time asymptotic behavior for the initial-boundary value problem for multi-term time-fractional diffusion equations, where the time differentiation consists of a finite summation…

偏微分方程分析 · 数学 2023-01-02 Zhiyuan Li , Yikan Liu , Masahiro Yamamoto

Consideration in this paper is the global well-posedness for the 3D axisymmetric MHD equations with only vertical dissipation and vertical magnetic diffusion. The existence of unique low-regularity global solutions of the system with…

偏微分方程分析 · 数学 2023-10-11 Hammadi Abidi , Guilong Gui , Xueli Ke

We discuss the derivation and the solutions of integro-differential equations (variable-order time-fractional diffusion equations) following as continuous limits for lattice continuous time random walk schemes with power-law waiting-time…

统计力学 · 物理学 2020-07-22 Philipp Roth , Igor M. Sokolov

In this study, the dynamics of a dissipationless incompressible Hall magnetohydrodynamic (HMHD) medium are formulated as geodesics on a direct product of two volume-preserving diffeomorphism groups. Formulations are given for the geodesic…

等离子体物理 · 物理学 2017-05-22 Keisuke Araki

We discuss the modeling of the hadronic phase of QCD at finite magnetic field in the framework of hadron resonance gas (HRG). We focus on the statistical description of particle yields that include contribution from resonance decays. We…