NDLI: Numerical Examination of Jets Induced by Multi-Bubble Interactions

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Mondal, Joydip Mishra, Arpit Lakkaraju, Rajaram Ghosh, Parthasarathi
Copyright Year	2018
Abstract	Jets produced by the interaction of collapsing cavitating bubbles containing high-pressure gases can be utilized for wide variety of applications e.g. particle erosion, medical purposes (lithotripsy, sonoporation), tannery effluent treatment, etc. Among the many parameters, this jetting is largely influenced by spatial orientation of bubbles, their times of inception, relative bubble size ratio. In this context, multiple cavitating bubbles are able to generate numerous simultaneous jets, under suitable conditions, hence operating over a wider coverage area. Such multi-bubble arrangements can go a long way in enhancing the erosive impact on a target location even at cryogenic temperature (< 123 K) and hence necessitate investigation. In this paper, different configurations of multiple-bubble interactions are numerically simulated to examine jets directed towards a target location (fictitious particle, cell etc.) using computational fluid dynamics. No phase change is considered and the effect of gravity is neglected. The transient behaviour of the interface between the two interacting fluids (bubble and ambient liquid) is modelled using VOF (volume of fluid) method. In this paper, results obtained for different bubble configurations through numerical simulation are validated against suitable literature and further explored to assess the resulting jet effects. The time histories of interacting bubbles are presented and the consequent flow-fields are evaluated by the pressure and velocity distributions obtained. The same calculation is repeated in cryogenic environment and the results are compared. An attempt is made to approach towards an optimum arrangement and conditions for particle erosion.
File Format	PDF
ISBN	9780791852101
DOI	10.1115/IMECE2018-87606
Volume Number	Volume 7: Fluids Engineering
Conference Proceedings	ASME 2018 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2018-11-09
Publisher Place	Pittsburgh, Pennsylvania, USA
Access Restriction	Subscribed
Subject Keyword	Temperature Computational fluid dynamics Computer simulation Gravity (force) Sewage treatment Flow (dynamics) Pressure Transients (dynamics) Gases High pressure (physics) Bubbles Fluids Biomedicine Particulate matter Jets Erosion
Content Type	Text
Resource Type	Article

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