Abstract
The origin and development of the Rayleigh-Taylor (R-T) instability is studied using an axisymmetric two-dimensional hydrodynamic code. It is observed that mushroomlike structures appear 2000 s after the blast shock and the R-T instability starts to grow at the H/He interface. These results correlate well with the Arnett et al. (1989) data. The extent of mixing in the ejecta of SN 1987A and the relation between R-T instability and mixing are examined. 36 refs.
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