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    Cross Helicity sign reversals in the dissipative scales of magnetohydrodynamic turbulence

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    Type
    Article
    Authors
    Titov, V.
    Stepanov, R.
    Yokoi, N.
    Verma, M.
    Samtaney, Ravi cc
    KAUST Department
    Fluid and Plasma Simulation Group (FPS)
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    project K1052
    Date
    2019-05-18
    Online Publication Date
    2019-04
    Print Publication Date
    2019-06
    Permanent link to this record
    http://hdl.handle.net/10754/656369
    
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    Abstract
    Direct numerical simulations of magnetohydrodynamic turbulence with kinetic energy and cross helicity injections at large scales are performed. It was observed that cross helicity changes its sign as we go from large and intermediate scales to small scales. In addition, the magnetic reconnections are strongest in the regions, where the cross helicity changes the sign and becomes smallest in magnitude. Thus, our simulations provide an important opportunity to explore the regions of magnetic reconnections in nonlinear MHD.
    Citation
    Cross helicity sign reversals in the dissipative scales of magnetohydrodynamic turbulence. (2019). Magnetohydrodynamics, 55(1-2), 225–232. doi:10.22364/mhd.55.1-2.27
    Sponsors
    We are grateful to Professor Franck Plunian for his interest in the subject and for useful comments. The developed mathematical model and the performed numerical simulations were supported by the Department of Science and Technology, India (INT/RUS/RSF/P-03) and by the Russian Science Foundation (RSF-16-41-02012) for the Indo-Russian project. Computational resources were provided by Shaheen II of the Supercomputing Laboratory at King Abdullah University of Science and Technology (KAUST) under project K1052. Theoretical studies of magnetic reconnection problems were also supported by the Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research 18H01212. We thank the Scientific Committee of the Third Russian Perm Conference on Magnetohydrodynamics for organizing a warm atmosphere and stimulation discussions.
    Publisher
    University of Latvia
    Journal
    Magnetohydrodynamics
    DOI
    10.22364/mhd.55.1-2.27
    arXiv
    1902.08253
    Additional Links
    http://www.mhd.sal.lv/contents/2019/1/MG.55.1.27.R.html
    http://arxiv.org/pdf/1902.08253
    ae974a485f413a2113503eed53cd6c53
    10.22364/mhd.55.1-2.27
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program

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