Astrophysics (Index)About


(spherical shock wave from a small volume)

A blastwave (or blast wave) can be thought of as a shock wave (faster-than-sound) expanding (spherically, if allowed to) from a small volume. A mathematical model developed by several physicists, including Leonid Sedov and Geoffrey Taylor, describes what is termed Sedov-Taylor expansion (or Sedov expansion), presuming expansion is an adiabatic process, i.e., for a phase somewhat after the blast the amount of energy in the volume behind the shock front is basically unchanging. The model is useful for powerful explosions (including nuclear explosions) and in astrophysics, supernovae and modeling supernova remnants. Sedov length is an astrophysical term for the distance from the initial blast at which the phase of Sedov expansion begins.

(physics,wave,fluid dynamics)
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Referenced by pages:
supernova remnant (SNR)