Abstract
ABSTRACTThis paper presents results of magnetohydrodynamic (MHD) simulations of flow curvature effects on the parallel velocity shear (PVS) driven instability in a magnetized plasma. Three flow profiles with identical velocity shear but different velocity curvature: positive curvature, no curvature, and negative curvature, are investigated with an MHD model. The total velocity jump of the positive curvature flow is higher than the linear flow, and the total velocity jump of the negative curvature flow is lower than the linear flow. It is found that by the same simulation time, the flow profile with a positive curvature yields more developed plasma density and magnetic field vortices compared with the other two flow profiles with linear and negative curvature flow profiles. The curvature effects are further quantitatively characterized by examining the transverse perturbations. The transverse kinetic energy growth rate of the positive curvature flow is higher than the linear flow, and higher than the negative curvature flow. The difference in growth rate appears to be comparable with the difference in the velocity shear frequency and consistent with previous theoretical work.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
