Zy. Jiang et Jf. Greenleaf, ACOUSTIC RADIATION PRESSURE IN A 3-DIMENSIONAL LOSSY MEDIUM, The Journal of the Acoustical Society of America, 100(2), 1996, pp. 741-747
Acoustic radiation pressure exerted by an arbitrary acoustic wave in a
three-dimensional lossy medium is calculated by extending an indirect
approach developed by Chu and Apfel [B-T. Chu and R. E. Apfel, ''Acou
stic radiation pressure produced by a beam of sound,'' J. Acoust. Sec.
Am. 72, 1673-1687 (1982)]. Without appealing to the detailed solution
s of equations governing fluid motion, a general analytic expression f
or the radiation pressure in lossy media with arbitrary waves is obtai
ned. When an infinite lossy medium is considered, the expression state
s that the radiation pressure, to the lowest order of approximation (i
.e., second order), is equal to corresponding total energy density. Fo
r a special class of confined spaces, the expression leads to a rather
general formula for the radiation pressure, in which the radiation pr
essure is given in terms of various energy densities in the field. Fur
thermore, a relationship among these energy densities is generalized t
o the case of lossy media, which enables one to compute the radiation
pressure in the class of spaces with the knowledge of the first-order
perturbation solution only. (C) 1996 Acoustical Society of America.