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. .
20th Texas Symposium on relativistic astrophysics
- Pub Date:
- October 2001
- Relativity and gravitation;
- Magnetohydrodynamics and plasmas;
- 3 pages, 1 figure. To appear in the proceedings of the 20th Texas Symposium on Relativistic Astrophysics