Free MHD Shear Layers In The Presence Of Rotation And Magnetic Field

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We present an experimental and numerical study of hydrodynamic and magnetohydrodynamic free shear layers and their stability. We first examine the experimental measurement of globally unstable hydrodynamic shear layers in the presence of rotation, and their range of instability. These are compared to numerical simulations, which are used to explain the modification of the shear layer and thus the critical Rossby number for stability. Magnetic fields are then applied to these scenarios, and globally unstable magnetohydrodynamic shear layers generated. These too are compared to numerical simulations, showing behavior consistent with the hydrodynamic case and previously reported measurements.

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Spence, E. J.; Roach, A. H.; Edlund, E. M.; Sloboda, P. & Ji, H. March 20, 2012.

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We present an experimental and numerical study of hydrodynamic and magnetohydrodynamic free shear layers and their stability. We first examine the experimental measurement of globally unstable hydrodynamic shear layers in the presence of rotation, and their range of instability. These are compared to numerical simulations, which are used to explain the modification of the shear layer and thus the critical Rossby number for stability. Magnetic fields are then applied to these scenarios, and globally unstable magnetohydrodynamic shear layers generated. These too are compared to numerical simulations, showing behavior consistent with the hydrodynamic case and previously reported measurements.

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  • Physics of Plasmas (December 2011)

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  • Report No.: PPPL-4747
  • Grant Number: DE-ACO2-09CH11466
  • Office of Scientific & Technical Information Report Number: 1037452
  • Archival Resource Key: ark:/67531/metadc833852

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  • March 20, 2012

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • June 28, 2016, 2:41 p.m.

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Spence, E. J.; Roach, A. H.; Edlund, E. M.; Sloboda, P. & Ji, H. Free MHD Shear Layers In The Presence Of Rotation And Magnetic Field, report, March 20, 2012; Princeton, New Jersey. (https://digital.library.unt.edu/ark:/67531/metadc833852/: accessed April 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.