Simulations of Astrophysical Fluid Instabilities

Details Simulations of Astrophysical Fluid Instabilities Simulations of Astrophysical Fluid Instabilities

2001-02-14

arxiv.org/abs/astro-ph/0102239v1

Astronomy and Astrophysics

Astrophysics

3 pages, 1 figure. To appear in the proceedings of the 20th Texas Symposium on Relativistic Astrophysics

Scientific paper

10.1063/1.1419596

We present direct numerical simulations of mixing at Rayleigh-Taylor unstable interfaces performed with the FLASH code, developed at the ASCI/Alliances Center for Astrophysical Thermonuclear Flashes at the University of Chicago. We present initial results of single-mode studies in two and three dimensions. Our results indicate that three-dimensional instabilities grow significantly faster than two-dimensional instabilities and that grid resolution can have a significant effect on instability growth rates. We also find that unphysical diffusive mixing occurs at the fluid interface, particularly in poorly resolved simulations.

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