Viscous Compressive MHD Turbulence

Details Viscous Compressive MHD Turbulence Viscous Compressive MHD Turbulence

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.4405b&link_type=abstract

American Astronomical Society Meeting 210, #44.05; Bulletin of the American Astronomical Society, Vol. 39, p.158

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We study high-Prandtl number, viscous, compressive MHD turbulence which occur, e.g., in MC (molecular clouds) or galaxy cluster media. In addition to previously studied weakly compressive case we also consider strongly compressive case, which could happen in dark molecular clouds. While the spectra of velocity and magnetic field are similar for both cases, there is a remarkable difference in structure. We discovered that unlike weakly compressive or incompressive viscous turbulence which consists of magnetic filaments or magnetic ropes, the strongly compressive one consists primarily of current sheets. This is due to the dominance of magnetic pressure over gas pressure. Various applications are discussed.

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