rarefaction

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rarefaction

 [rar″ĕ-fak´shun]
the condition of being or becoming less dense.

rar·e·fac·tion

(rār'ĕ-fak'shŭn),
1. The process of becoming light or less dense; the condition of being light; opposed to condensation.
2. In vascular physiology, the process that results in a reduction in the density of capillaries in a tissue.
[L. rarus, thin, scanty + facio, to make]

rar·e·fac·tion

(rār'ĕ-fak'shŭn)
1. The process of becoming light or less dense.
2. The condition of being light; opposed to condensation.
[L. rarus, thin, scanty + facio, to make]
References in periodicals archive ?
for [psi] > 1.Hence from (66), f([psi]) > 0 for 1 < [psi] < [PSI] and a rarefactive solitary wave solution exists.
When the permeability satisfies the power law (30), a rarefactive solitary wave solution exists for n>1 and does not exist for 0 [less than or equal to] n [less than or equal to] 1 [5].
Now from (61) and (62), the rarefactive solitary wave solution is given by the following:
This limiting value also holds for the dimensionless velocity of rarefactive solitary waves for the power law (31) with n > 1.