Simulation of highly turbulent compressible convection showing the vorticity (localized spin) of fluid motions concentrated into an evolving network of vortex tubes and rings near the upper surface. Such high-resolution fluid modeling of solar convection is now possible with parallel computer systems. See page 1370 and the special section on computational fluid dynamics beginning on page 1353. [Simulation: D. Porter and P. Woodward on Cray T3D at Pittsburgh Supercomputing Center. Imaging: N. Brummell and D. Porter]

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