Abstract
To research the dynamics of the cavitation bubble under the interaction of particle clusters, the bubble morphological evolutionary characteristics near three equal-sized spherical particles are theoretically explored in the present study based on the Weiss theorem and the velocity potential superposition theory. The three particles are arranged symmetrically, and the fluid velocity field near the three particles and the cavitation bubble is obtained. Moreover, the effects of the bubble-particle distance and the maximum radius of the cavitation bubble on the fluid velocity are investigated, and the contribution mechanisms of the fluid velocity field constituents are compared. The analysis has found that: (1) The fluid velocity between the bubble and the particle is lower than that at the other locations in both the growth and collapse phases, thus the bubble cannot always maintain a standard spherical shape. (2) The bubble-particle distance and the maximum radius of the cavitation bubble are the key parameters affecting the circumferential inhomogeneity of the radial velocity of the fluid around the bubble. The larger the maximum radius or the smaller the bubble-particle distance is, the more visible the non-circularity of the bubble morphology. (3) The image bubbles and the linear sinks contribute oppositely to the fluid velocity field, and the presence of the image bubble reduces the fluid velocity. In the low velocity region, the image bubble is the main mechanism contributing to the effect of the particle on the fluid velocity.
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Conflict of interest: The authors declare that they have no conflict of interest. All authors declare that there are no other competing interests.
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Project supported by the National Natural Science Foundation of China (Grant No. 52076215).
Biography: Yu-ning Zhang (1986-), Female, Ph. D., Associate Professor
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Zhang, Yn., Ding, Zl., Hu, Jr. et al. Theoretical investigation on the cavitation bubble dynamics near three spherical particles based on Weiss theorem. J Hydrodyn 35, 1119–1130 (2023). https://doi.org/10.1007/s42241-024-0081-z
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DOI: https://doi.org/10.1007/s42241-024-0081-z