# Vortices in Thin, Compressible, Unmagnetized Disks

@article{Johnson2005VorticesIT, title={Vortices in Thin, Compressible, Unmagnetized Disks}, author={Bryan M. Johnson and Charles F. Gammie}, journal={The Astrophysical Journal}, year={2005}, volume={635}, pages={149-156} }

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, Σδvrδv. This effect appears only at high resolution. The transport, which decays…

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