Abstract
Observations of the behavior of spark-generated bubbles in the vicinity of solid and free boundaries are described. In all cases, the formation of a reentering region (microjet or constriction) occurs on the part of the bubble which has the most freedom of motion. Drag-reducing polymer additives are seen to significantly affect bubble departure from sphericity. Their presence weakens the influence of nearby solid boundaries, and seems to enhance that of a free surface. The relative importance of the acoustic pulses emitted during successive implosions and rebounds of the bubble is seen to be modified by the proximity of a solid wall. When the radius of the bubble is small compared to its distance from the closest boundary, a theoretical approach, using matched asymptotic expansion, is applied successfully to describe the nonspherical bubble behavior and the pressure field. This method is extended to the case of a multi-bubble system. It is very useful in determining the limiting distances of interaction. In the case of a free surface this distance is less than two bubble diameters. When applied to a solid wall covered with an elastic coating of finite thickness, or to a two-liquid interface this technique shows a selection process: bubbles closer than a limiting distance to the boundary are repelled during their collapse. The collapse is toward the boundary only for bubbles beyond this distance and is therefore less damaging.
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References
Bovis AK and Chahine GL (1981) Etude asymptotique de l'interaction d'une bulle oscillante avec une surface libre voisine. J de mécanique 20 (3): 537–556.
Chahine GL (1974) Etude asymptotique et expérimentale des oscillations et du collapse des bulles. Docteur Ingénieur thesis. Paris VI: ENSTA rep. 042.
Chahine GL (1977) Interaction between an oscillating bubble and a free surface. J Fluids Engr 99: 709–716.
Chahine GL (1979) Etude locale de phénomène de cavitation. Analyse des facteurs régissant la dynamique des interfaces. Docteur d'Etat es-Sciences thesis. University Paris VI: ENSTA rep. 116.
Chahine GL and Fruman DH (1979) Dilute polymer solution effects on bubble growth and collapse. Phys fluids 22 (7): 1406–1408.
Chahine GL, Cohen D, Ducasse P and Ligneul L (1979) Influence d'un revêtement élastique sur le collapse d'une bulle de cavitation au voisinage d'une paroi solide. Proc 4th Int meeting on water-column separation. Cagliari, Italy: ENEL relazione n. 382, Nov. 1980: 204–223.
Chahine GL and Morine AK (1979) Collapse d'une bulle de caviation entre deux parois solides. Proc 4th Int meeting on water-column separation. Cagliari, Italy: ENEL relazione n. 382, Nov. 1980: 79–101.
Chahine GL, Courbière C and Garnaud P (1979) Correlation between noise and dynamics of cavitation bubbles. Proc 6th conf on fluid machinery. Budapest, Hungary, pp 200–210.
Chahine GL and Morine AK (1980) The influence of polymer additives on the collapse of a bubble between two solid walls. ASME Cavitation and polyphase flow forum. New Orleans, Louisiana, pp 7–9.
Chahine GL and Bovis AG (1980) Oscillation and collapse of a cavitation bubble in the vicinity of a two-liquid interface. In: Cavitation and inhomogeneities in underwater acoustics, pp 23–30. New York: Springer Verlag.
Chahine GL and Bovis AG (1981) Pressure field generated by nonspherical bubble collapse. Proc ASME symp Cavitation erosion in fluid systems. Boulder, Colorado, pp 27–41.
Ellis AT and Ting LY (1974) Non Newtonian effects on flow cavitation and on cavitation in a pressure field. NASA SP-304, Vol. 1: 403–421.
Gates EM and Acosta AJ (1978) Some effects of several free stream factors on cavitation inception on axisymmetric bodies. Proc 12th Symp Naval Hydrodynamics N.A.S. Washington, pp 86–112.
Gibson DG (1972) The pulsation time of spark induced vapor bubbles. J Basic Engr, March: 248–249.
Hammitt FG (1980) Cavitation and multiphase flow phenomena. New York: McGraw Hill Int Book Company.
Hoyt JW (1977) Cavitation in polymer solution and fiber suspensions. ASME Cavitation and polyphase flow forum. Fort-Collins, 9–10.
Ligneul P (1980) Etude expérimentale de l'influence d'un champ de vitesse cisaillé sur la déformation d'une bulle de cavitation. ENSTA rep. 134.
Morine AK and Breuil A (1981) Etude de l'érosion due a l'implosion d'une bulle de cavitation. ENSTA rep. 141.
Plesset MS and Prosperetti A (1977) Bubble dynamics and cavitation. Annual Review J Fluid Mech 9: 145–185.
Ross D (1976) Mechanics of underwater noise. New York: Pergamon Press Inc.
Yang WJ and Lawson ML (1974) Bubble pulsation and cavitation in viscoelastic liquids. J Appl Phys 22 (7): 1406–1407.
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Chahine, G.L. Experimental and asymptotic study of nonspherical bubble collapse. Applied Scientific Research 38, 187–197 (1982). https://doi.org/10.1007/BF00385948
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DOI: https://doi.org/10.1007/BF00385948