Numerical and Experimental Study of Bubble Dynamics in Contact with a Solid Surface
Numerical and Experimental Study of Bubble Dynamics in Contact with a Solid Surface
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与固体表面接触的气泡动力学的数值和实验研究
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
S. Sametov
中科院分区：
文献类型：
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作者：
O. Abramova;I. Akhatov;N. Gumerov;Y. Pityuk;S. Sametov
提出了一种复杂的数值和实验相结合的方法来研究声场作用下气泡与表面接触的三维动力学问题。该数值方法基于势流的边界元方法，是求解三维问题最有效的方法。由中央图形处理器组成的异类计算机体系结构的使用变得越来越流行，这使得增加问题的规模和充分减少计算时间成为可能。网格失稳问题是使用球面过滤器解决的。为了描述接触线动力学，采用了半经验的运动定律。实验方法是基于高速记录和光学显微镜。一个气泡接触到由丙烯酸玻璃制成的实验电池的内表面，里面装满了蒸馏水。使用水听器测量由圆盘形声辐射器产生的小室内的声场。对于固定或移动接触线的情况，考虑了气泡与亲水性表面的接触行为。研究了气泡的形状和体积振荡。数值模拟结果与实验数据定性吻合。
A complex numerical and experimental method is proposed for studying 3D dynamics of a bubble contacting with a surface in the presence of an acoustic field. The numerical approach is based on the boundary element method for potential flows, which is most efficient for solving the problems in a 3D formulation. The use of heterogeneous computer architectures consisting of central graphic processors and becoming more and more popular makes it possible to increase the scale of the problem and sufficiently reduce the calculation time. The mesh destabilization problems are solved using a spherical filter. To describe the contact line dynamics, a semi-empirical law of motion is used. The experimental method is based on high-speed recording and optical microscopy. An air bubble contacts with the inner surface of an experimental cell made from acrylic glass and filled with distilled water. The acoustic field in the cell generated by a disk-shaped acoustic radiator is measured using a hydrophone. The behavior of the bubble contacting with a hydrophillic surface is considered for the cases of a fixed or moving contact line. The shape and volume oscillations of the bubble are investigated. The results of numerical simulations agree qualitatively with the experimental data.