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Onset of cavity deformation upon subsonic motion of a projectile in a fluid complex plasma | | D.I. Zhukhovitskii
; A.V. Ivlev
; V.E. Fortov
; G.E. Morfill
; | | Date: |
28 Jan 2013 | | Abstract: | We study deformation of a cavity around a large projectile moving with
subsonic velocity in the cloud of small dust particles. To solve this problem,
we employ the Navier-Stokes equation for a compressible fluid with due regard
for friction between dust particles and atoms of neutral gas. The solutions
shows that due to friction, the pressure of dust cloud at the boundary of the
cavity behind the projectile can become negative, which entails formation of a
microscopic void free from dust particles -- the cavity deformation. The
corresponding threshold velocity is calculated, which is found to decrease with
increasing cavity size. Measurement of such velocity makes it possible to
estimate the static pressure inside the dist cloud. | | Source: | arXiv, 1301.6597 | | Services: | Forum | Review | PDF | Favorites | |
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