The Proceedings of the Fluids engineering conference
Online ISSN : 2424-2896
2010
Session ID : 0406
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0406 A Study of Nonspherical Bubble Collapse Behavior near Wall Boundary
Naoya OCHIAIYuka IGAMotohiko NOHMIToshiaki IKOHAGI
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
Collapsing bubble near wall boundary is numerically analyzed to clarify the mechanism of cavitation bubble collapse and develop numerical prediction method of cavitation erosion. 2D axisymmetric and 3D plane-symmetric calculations using a locally homogeneous model of gas-liquid two-phase medium are performed until the second bubble collapse. It is confirmed that microjet generation, propagation of induced pressure wave and collapse of torus bubble can be realized and that the second collapse is responsible for the intensity of cavitation erosion. It is also found that the collapse of slightly asymmetric bubble from spherical bubble causes the different distribution of maximum impact pressure.
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© 2010 The Japan Society of Mechanical Engineers
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