Characterization of Flow-Magnetic Field Interactions in Magneto-Hydrodynamic Turbulence-Reference-Cited by-同舟云学术

Characterization of Flow-Magnetic Field Interactions in Magneto-Hydrodynamic Turbulence

Published:2013-01-25 Issue:3 Volume:8 Page:
ISSN:1555-1415
Container-title:Journal of Computational and Nonlinear Dynamics
language:en
Short-container-title:

Author:

Richard Jacques C.¹,Kumar Gaurav²,Kalmár-Nagy Tamás³,Girimaji Sharath S.⁴

Affiliation:

1. Mem. ASME Senior Lecturer e-mail:

2. Graduate Student e-mail: Department of Aerospace Engineering, Texas A&M University, College Station, TX 77843-3141

3. Mem. ASME Principal Member Research Staff Mitsubishi Electric Research Laboratory, Cambridge, MA 02139 e-mail:

4. Mem. ASME Professor Department of Aerospace Engineering, Texas A&M University, College Station, TX 77843-3141 e-mail:

Abstract

We examine the complex nonlinear flow-magnetic field dynamics in magneto-hydrodynamic (MHD) turbulence. Using direct numerical simulations (DNS), we investigate the dynamical interactions subject to the influence of a uniform applied background magnetic field. The initial magnetic and kinetic Reynolds numbers (based on Taylor microscale) are 45 and there are no initial magnetic field fluctuations. The sum total of turbulent magnetic and kinetic energies decays monotonically. With time, the turbulent magnetic fluctuations grow by extracting energy from velocity fluctuations. Expectedly, the distribution of energy between kinetic and magnetic fluctuations exhibits large periodic oscillations from the equipartition state due to Alfvén waves. We perform a detailed analysis of the flow-magnetic field coupling and posit a simple model for the energy interchange. Such dynamical analysis can provide the insight required for turbulence control and closure modeling strategies.

Publisher

ASME International

Subject

Applied Mathematics,Mechanical Engineering,Control and Systems Engineering,Applied Mathematics,Mechanical Engineering,Control and Systems Engineering

Link

http://asmedigitalcollection.asme.org/computationalnonlinear/article-pdf/doi/10.1115/1.4023323/6104192/cnd_8_3_031010.pdf

Reference57 articles.

1. Experimental Evidence of Alfvén Wave Propagation in a Gallium Alloy;Phys. Fluids,2011

2. Computational Aspects of Astrophysical MHD and Turbulence,2003

3. Magnetic Helicity Effects in Astrophysical and Laboratory Dynamos;New J. Phys.,2007

4. Dynamo Regimes With a Nonhelical Forcing;Astrophys. J.,2005

5. Numerical Simulation of Helical Magnetohydrodynamic Turbulence;J. Fluid Mech.,1978

Cited by 2 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. A linear model of turbulence: reproducing the Kolmogorov-spectrum;IFAC-PapersOnLine;2018

2. Enhanced Self-Assembly of Metal Oxides and Metal-Organic Frameworks from Precursors with Magnetohydrodynamically Induced Long-Lived Collective Spin States;Advanced Materials;2014-06-02