Two- and three-dimensional behavior of Rayleigh-Taylor and Kelvin-Helmholtz instabilities

Two and three dimensional behavior of the R-T and K-H instabilities is examined with a newly developed hydrodynamic code. The mushroom structure owing to the K-H instability is quite different in two and three dimensions. The simulation without gravity shows similar behavior and hence this difference between two and three dimensions does not originate from the R-T instability. The difference cannot be explained by a linear analysis on the K-H instability.