NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Numerical simulation of the compressible Orszag-Tang vortex 2. Supersonic flowThe numerical investigation of the Orszag-Tang vortex system in compressible magnetofluids will consider initial conditions with embedded supersonic regions. The simulations have initial average Mach numbers 1.0 and 1.5 and beta 10/3 with Lundquist numbers 50, 100, or 200. The behavior of the system differs significantly from that found previously for the incompressible and subsonic analogs. Shocks form at the downstream boundaries of the embedded supersonic regions outside the central magnetic X-point and produce strong local current sheets which dissipate appreciable magnetic energy. Reconnection at the central X-point, which dominates the incompressible and subsonic systems, peaks later and has a smaller impact as M increases from 0.6 to 1.5. Similarly, correlation between the momentum and magnetic field begins significant growth later than in subsonic and incompressible flows. The shocks bound large compression regions, which dominate the wavenumber spectra of autocorrelations in mass density, velocity, and magnetic field.
Document ID
19910003037
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Picone, J. M. (Naval Research Lab. Washington, DC, United States)
Dahlburg, Russell B. (Naval Research Lab. Washington, DC, United States)
Date Acquired
September 6, 2013
Publication Date
August 5, 1990
Subject Category
Plasma Physics
Report/Patent Number
AD-A224913
NASA-CR-185877
NRL-MR-6690
NAS 1.26:185877
Accession Number
91N12350
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available