AAS 197, January 2001
Session 44. Observations and Analysis of Stellar Atmospheres
Display, Tuesday, January 9, 2001, 9:30am-7:00pm, Exhibit Hall

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[44.02] AGB Stellar Convection: Advancements in large-scale 3D numerical simulations using PPMstar

M.L. Jacobs, D.H. Porter, B.V. Merkey, P.R. Woodward (University of Minnesota)

High resolution three dimensional red giant models are presented using the newest version of PPMstar. Recent modifications include an improved photosphere and the addition of a dynamic treatment of gravity. These additions allow us to trace large-scale high Mach number shockwaves propagating through the photosphere and merging outside. With the new gravity treatment we re-evaluate the large-scale convective motions and radial pulsations in the presence of a dynamically adjusting potential. We also present new visualizations that demonstrate fundamental correlations of a variety of physical quantities (kinetic energy flux, Relative temperature fluctuations, vorticity, enthalphy flux, radial velocity, etc.) in our models.

All simulations were run on the Origin 2000 cluster of machines at the National Center for Supercomputing Applications (NCSA).

If you would like more information about this abstract, please follow the link to http://www.lcse.umn.edu. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: mjacobs@astro.umn.edu

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