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Article overview
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Speedy motions of a body immersed in an infinitely extended medium | | P. Buttà
; G. Ferrari
; C. Marchioro
; | | Date: |
12 Oct 2009 | | Abstract: | We study the motion of a classical point body of mass M, moving under the
action of a constant force of intensity E and immersed in a Vlasov fluid of
free particles, interacting with the body via a bounded short range potential
Psi. We prove that if its initial velocity is large enough then the body
escapes to infinity increasing its speed without any bound "runaway effect".
Moreover, the body asymptotically reaches a uniformly accelerated motion with
acceleration E/M. We then discuss at a heuristic level the case in which Psi(r)
diverges at short distances like g r^{-a}, g,a>0, by showing that the runaway
effect still occurs if a<2. | | Source: | arXiv, 0910.2184 | | Services: | Forum | Review | PDF | Favorites | |
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