Nonlinear Effects in the Dynamics of Clouds of Bubbles
CaltechAUTHORS
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Title 
Nonlinear Effects in the Dynamics of Clouds of Bubbles


Creator 
Kumar, Sanjay
Brennen, Christopher E. 

Subject 
Caltech Library Services


Description 
This paper persents a spectral analysis of the response of a fluid containing bubbles to the motions of a wall oscillating normal to itself. First, a Fourier analysis of the RayleighPlesset equations is used to obtain an approximate solution for the nonlinear effects in the oscillation of a single bubble in an infinite fluid. This is used in the approximate solution of the oscillating wall problem, and the resulting expressions are evaluated numerically in order to examine the nonlinear effects. Harmonic generation results from the nonlinearity. It is observed that the bubble natural frequency remains the dominant natural frequency in the volume oscillations of the bubbles near the wall. On the other hand, the pressure perturbations near the wall are dominated by the first and second harmonics present at twice the natural frequency while the pressure perturbation at the natural frequency of the bubble is inhibited. The response at the forcing frequency and its harmonics is explored along with the variation with amplitude of wall oscillation, void fraction, and viscous and surface tension effects. Splitting and cancellation of frequencies of maximum and minimum response due to enhanced nonlinear effects are also observed.


Date 
199102


Type 
Article
PeerReviewed 

Format 
application/pdf


Identifier 
http://authors.library.caltech.edu/114/1/KUM110.pdf
Kumar, Sanjay and Brennen, Christopher E. (1991) Nonlinear Effects in the Dynamics of Clouds of Bubbles. Journal of the Acoustical Society of America, 89 . pp. 707714. ISSN 00014966. http://resolver.caltech.edu/CaltechAUTHORS:KUMjasa91 <http://resolver.caltech.edu/CaltechAUTHORS:KUMjasa91> 

Relation 
http://resolver.caltech.edu/CaltechAUTHORS:KUMjasa91
http://authors.library.caltech.edu/114/ 
