Numerical and Experimental Studies of Collapsing Cavitation Bubbles for Ballast Water Treatment

Chang-Wei, K., Tandiono, T., Xin, L., Turangan, C. K., Osman, H., Lim, F. , Lucas, M. and Tan, M. (2018) Numerical and Experimental Studies of Collapsing Cavitation Bubbles for Ballast Water Treatment. In: 37th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2018), Madrid, Spain, 7-22 Jun 2018, ISBN 9780791851272 (doi: 10.1115/OMAE2018-77157)

Abstract

In this paper, we report both experimental and computational studies of hydrodynamic cavitation generated by accelerating liquid through a series of constrictions. The detailed process of cavitation generation is visualized using a high-speed photography. The cavitation is initiated when a gas bubble moves towards the constrictions. The gas bubble initially accelerates, expands and then splits into smaller bubbles when it moves along the constriction. As these bubbles migrate into a large liquid compartment, they collapse violently to form a bubble cloud, owing to a sudden jump in liquid pressure in the compartment. The experimental observation is further confirmed using computational fluid dynamics (CFD) simulations. We also present experimental evidence showing a significant reduction in gram-negative Escherichia coli concentration after it passes through the constrictions.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lim, Dr Fannon and Lucas, Professor Margaret
• Authors: Chang-Wei, K., Tandiono, T., Xin, L., Turangan, C. K., Osman, H., Lim, F., Lucas, M., and Tan, M.
• College/School: College of Science and Engineering > School of Engineering; College of Science and Engineering > School of Engineering > Systems Power and Energy
• ISBN: 9780791851272
• First Published: First published in Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering OMAE2018 June 17-22, 2018, Madrid, Spain, OMAE2018-77157

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