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Numerical study of spike characteristics due to the motions of a non-spherical rebounding bubble

ISSN号：1001-6058
期刊名称：《水动力学研究与进展：英文版》
时间：0
分类：O413[理学—理论物理;理学—物理] TD235.211[矿业工程—矿井建设]
作者机构：[1]Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116023, China, [2]Marine Design and Research Institute of China, Shanghai 200011, China, [3]Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116023,China
相关基金：supported by the National Natural Science Foun-dation of China（Grant Nos.51221961,51279030）; the National Key Basic Research Development Program of China（973 Pro-gram,Grant Nos.2013CB036101,2010CB832704）; the Fundamental Research Funds for the Central Universities（Grant No.L2012016）

关键词：气泡脉动周期, 数值研究, 运动特性, 回弹, 非线性相互作用, 自由表面, 球形, 边界积分法, boundary integral method toroidal bubble free surface spike

中文摘要：

The boundary integral method(BIM) is used to simulate the 3-D gas bubble, generated within the two bubble pulsation periods in proximity to a free surface in an inviscid, incompressible and irrotational flow. The present method is well validated by comparing the calculated shapes of the bubble and the free surface with both the experimental results and the numerical ones obtained by the Axisymmetric BIM code. The expansion, the collapse of the gas bubble and the further evolution of the rebounding non-spherical bubble are simulated. The various variation patterns of the free surface spike and the bubble centroid for different standoff distances, the buoyancy parameters and the strength parameters are obtained to reveal the nonlinear interaction between the bubble and the free surface. The amplitude of the second maximum bubble volume and the four typical patterns of the bubble jet and the free surface spike are examined in the context of the standoff distance. The large buoyancy is used to elevate the spray dome rather than the free surface spike.

英文摘要：

The boundary integral method（BIM） is used to simulate the 3-D gas bubble, generated within the two bubble pulsation periods in proximity to a free surface in an inviscid, incompressible and irrotational flow. The present method is well validated by comparing the calculated shapes of the bubble and the free surface with both the experimental results and the numerical ones obtained by the Axisymmetric BIM code. The expansion, the collapse of the gas bubble and the further evolution of the rebounding non-spherical bubble are simulated. The various variation patterns of the free surface spike and the bubble centroid for different standoff distances, the buoyancy parameters and the strength parameters are obtained to reveal the nonlinear interaction between the bubble and the free surface. The amplitude of the second maximum bubble volume and the four typical patterns of the bubble jet and the free surface spike are examined in the context of the standoff distance. The large buoyancy is used to elevate the spray dome rather than the free surface spike.