Numerical Study of Boundary Effect During the Collapse of Single Vapor Bubble

Abstract

Abstract:

Abstract： The collapse under the effect of the two kinds of boundaries was simulated by using the numerical method, coupling the volume of fluid multiphase method and cavitation model, and changing the distance from the single air bubble to the vertical wall and the surface of the water. In the earlier stage, the shape of bubble was mainly affected by the surface of the water and the upper surface of bubble was sunk. In the final stage, the influence of the wall became notable and the sunken direction pointed to the wall gradually. The closer the distance between the bubble and the wall, the shorter the collapse lasts. While the nearer the distance between the bubble and the surface of water, the longer the collapse continues. The distance between the bubble and the vertical wall determines the peak of pressure on the vertical wall.

Key words: volume of fluid method, cavitation, bubble collapse, boundary effect

CLC Number:

O 359

ZHANG Majuna,CHEN Xina,b. Numerical Study of Boundary Effect During the Collapse of Single Vapor Bubble[J]. Journal of Shanghai Jiaotong University, 2014, 48(12): 1766-1771.

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