Vortices in Thin, Compressible, Unmagnetized Disks

Details Vortices in Thin, Compressible, Unmagnetized Disks Vortices in Thin, Compressible, Unmagnetized Disks

2006-04-03

arxiv.org/abs/astro-ph/0604034v1

Astrophys.J. 635 (2005) 149-156

Astronomy and Astrophysics

Astrophysics

8 pages, 10 figures (high resolution figures available in ApJ electronic edition)

Scientific paper

10.1086/497358

We consider the formation and evolution of vortices in a hydrodynamic shearing-sheet model. The evolution is done numerically using a version of the ZEUS code. Consistent with earlier results, an injected vorticity field evolves into a set of long-lived vortices, each of which has a radial extent comparable to the local scale height. But we also find that the resulting velocity field has a positive shear stress, . This effect appears only at high resolution. The transport, which decays with time as t^-1/2, arises primarily because the vortices drive compressive motions. This result suggests a possible mechanism for angular momentum transport in low-ionization disks, with two important caveats: a mechanism must be found to inject vorticity into the disk, and the vortices must not decay rapidly due to three-dimensional instabilities.

Affiliated with

Also associated with

No associations

Rating

Vortices in Thin, Compressible, Unmagnetized Disks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Vortices in Thin, Compressible, Unmagnetized Disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vortices in Thin, Compressible, Unmagnetized Disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-443975