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Article #78

Overpressure Wavefront Analysis

#78
From: Myself
Date: Sat, 21 Nov 1992 02:15
41 lines
2632 bytes
  [note - I have previously posted this on rec.pyrotechnics, who suggested I 
    try this group]

  I am looking for formulae / equations / help useful for determining the
form of abnormalities on the surface of an expanding wavefront caused by
a medium-scale detonation.
  In normal english:
    Assuming and 'ideal' chemical detonation, with the explosive undergoing
complete and balanced core ---> surface combustion, in an identical - gradient
atmosphere, the resulting shockwave / overpressure wavefront would be a perfect
sphere. Aside from the explosive itself, the surface of the sphere is deformed
in a real atmosphere by variences in the pressure gradients of the surrounding
atmosphere - 'eddies', or air currents - I need to know if there is a way to
determine what the shape of the deformations in the surface of the shockwave
would be (yes, I know that they would be miniscule, and swamped by the shockwave
itself - that is why I cannot do this empiracly!). I know that this gets very
complex in a rather annoyingly short time, but I need to know if it is possible
to do without a CRAY, even for a small, single or double eddy simulation.
  The things I need specifically are :
      A) Formulae or equations for the fluid dynamics
      B) Suggestions for implementing A in a reasonable manner
      C) Any miscellaneous other help available

    Thank you all in advance, and gratituedes for reading this post,

	Myself (lyn@matt.ksu.ksu.edu)
	StormWind @ kids MUSH
	VERY amateur visualization programmer
	And many other irreleavant things

P.S. This is completely theoretical, and as far as I can see, does not have any
	scientific value, other than edifying myself. (I can, however, post
	any results that may come up, if enough interest is shown)



-- 
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Head of Synergy Systems, a non-official group of aspiring hackers creating and
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From: lyn@matt.ksu.ksu.edu (Myself)
Newsgroups: sci.geo.fluids
Subject: Overpressure Wavefront Analysis
Date: 20 Nov 1992 20:15:06 -0600
Organization: Kansas State University
Lines: 41
Message-ID: <1ek63aINNjt8@matt.ksu.ksu.edu>
NNTP-Posting-Host: matt.ksu.ksu.edu
Summary: Request for formulae concerning modeling of an Overpressure Wavefront c
Keywords: detonation, explosion, overpressure, wavefront, formulae