ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Phase field simulation of single bubble behavior under an electric field |
Chang-Sheng Zhu(朱昶胜)1,2, Dan Han(韩丹)1, Sheng Xu(徐升)1 |
1 School of Computer and Communication, Lanzhou University of Technology, Lanzhou 730050, China;
2 State Key Laboratory of Gansu Advanced Processing and Recycling of Non-Ferrous Metal, Lanzhou University of Technology, Lanzhou 730050, China |
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Abstract Based on the Cahn-Hilliard phase field model, a three-dimensional multiple-field coupling model for simulating the motion characteristics of a rising bubble in a liquid is established in a gas-liquid two-phase flow. The gas-liquid interface motion is simulated by using a phase-field method, and the effect of the electric field intensity on bubble dynamics is studied without electric field, or with vertical electric field or horizontal electric field. Through the coupling effect of electric field and flow field, the deformation of a single rising bubble and the formation of wake vortices under the action of gravity and electric field force are studied in detail. The correctness of the results is verified by mass conservation, and the influences of different electric field directions and different voltages on the movement of bubbles in liquid are considered. The results show that the ratio of the length to axis is proportional to the strength of the electric field when the air bubble is stretched into an ellipsoid along the electric field line under the action of electrostatic gravity and surface tension. In addition, the bubble rising speed is affected by the electric field, the vertical electric field accelerates the bubble rise, and the horizontal direction slows it down.
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Received: 21 January 2018
Revised: 14 May 2018
Accepted manuscript online:
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PACS:
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47.11.-j
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(Computational methods in fluid dynamics)
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47.55.dd
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(Bubble dynamics)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51661020, 11504149, and 11364024), the Postdoctoral Science Foundation of China (Grant No. 2014M560371), and the Funds for Distinguished Young Scientists of Lanzhou University of Technology, China (Grant No. J201304). |
Corresponding Authors:
Chang-Sheng Zhu
E-mail: zhucs_2008@163.com
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Cite this article:
Chang-Sheng Zhu(朱昶胜), Dan Han(韩丹), Sheng Xu(徐升) Phase field simulation of single bubble behavior under an electric field 2018 Chin. Phys. B 27 094704
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