Linearized Dynamics of TwoDimensional Bubbly and Cavitating Flows Over Slender Surfaces
CaltechAUTHORS
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Title 
Linearized Dynamics of TwoDimensional Bubbly and Cavitating Flows Over Slender Surfaces


Creator 
d'Agostino, Luca
Brennen, Christopher E. Acosta, Allan J. 

Subject 
Caltech Library Services


Description 
The present work investigates the dynamics of twodimensional, steady bubbly flows over a surface and inside a symmetric channel with sinusoidal profiles. Bubble dynamics effects are included. The equations of motion for the average flow and the bubble radius are linearized and a closedform solution is obtained. Energy dissipation due to viscous, thermal and liquid compressibility effects in the dynamics of the bubbles is included, while the relative motion of the two phases and viscous effects at the flow boundaries are neglected. The results are then generalized by means of Fourier synthesis to the case of surfaces with slender profiles of arbitrary shape. The flows display various flow regimes (subsonic, supersonic and superresonant) with different properties according to the value of the relevant flow parameters. Examples are discussed in order to show the effects of the inclusion of the various energy dissipation mechanisms on the flows subject to harmonic excitation. Finally the results for a flow over a surface with a Gaussianshaped bump are presented and the most important limitations of the theory are briefly discussed.


Date 
1988


Type 
Article
PeerReviewed 

Format 
application/pdf


Identifier 
http://authors.library.caltech.edu/85/1/DAG086.pdf
d'Agostino, Luca and Brennen, Christopher E. and Acosta, Allan J. (1988) Linearized Dynamics of TwoDimensional Bubbly and Cavitating Flows Over Slender Surfaces. Journal of Fluid Mechanics, 192 . pp. 485509. ISSN 00221120. http://resolver.caltech.edu/CaltechAUTHORS:DAGjfm88 <http://resolver.caltech.edu/CaltechAUTHORS:DAGjfm88> 

Relation 
http://resolver.caltech.edu/CaltechAUTHORS:DAGjfm88
http://authors.library.caltech.edu/85/ 
