Author： Tjøtta Sigve
Publisher： S. Hirzel Verlag
ISSN： 1610-1928
Source： Acta Acustica united with Acustica, Vol.85, Iss.6, 1999-11, pp. : 780-787
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Abstract
Some nonlinear effects associated with intense sound fields in fluids, are considered theoretically. The analysis is based on the fundamental equations of motion for a homogeneous, thermoviscous fluid, for which thermal equations of state exist. Model equations are derived and used to analyze nonlinear sources for generation of heat and streaming, and other changes in the ambient state of the fluid. The intensity of a finite amplitude sound field is calculated, and related to the sources of generation of higher order effects. Fluctuations in the coefficients of viscosity and thermal conductivity caused by the sound field, are accounted for.
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