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http://dx.doi.org/10.26748/KSOE.2018.2.32.1.028

Analysis of Velocity Potential around Pulsating Bubble near Free or Rigid Surfaces Based on Image Method  

Lee, Sangryun (Department of Mechanical Engineering, KAIST)
Choi, Gulgi (Department of Mechanical Engineering, KAIST)
Kim, Jongchul (Agency for Defense Development)
Ryu, Seunghwa (Department of Mechanical Engineering, KAIST)
Publication Information
Journal of Ocean Engineering and Technology / v.32, no.1, 2018 , pp. 28-35 More about this Journal
Abstract
An analytical method for predicting the velocity potential around a pulsating bubble close to a free or rigid wall was established using an image method. Because the velocity potential should satisfy two boundary conditions at the bubble surface and rigid wall, we investigated the velocity in the normal direction at the two boundaries by adding the image bubbles. The potential was analyzed by decomposing the bubble motion as two independent motions, pulsation and translation, and we found that when the number of image bubbles was greater than ten, the two boundary conditions were satisfied for the translation term. By adding many image bubbles after the approximation of the pulsation term, we also confirmed that the boundary condition at the wall was satisfied.
Keywords
Bubble motion; Image bubble; Velocity potential; Pulsation; Translation;
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Times Cited By KSCI : 1  (Citation Analysis)
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