Heat transfer during cavitation bubble collapse

Article


Qin, Zongyi and Alehossein, Habib. 2016. "Heat transfer during cavitation bubble collapse." Applied Thermal Engineering. 105, pp. 1067-1075. https://doi.org/10.1016/j.applthermaleng.2016.01.049
Article Title

Heat transfer during cavitation bubble collapse

ERA Journal ID3658
Article CategoryArticle
AuthorsQin, Zongyi (Author) and Alehossein, Habib (Author)
Journal TitleApplied Thermal Engineering
Journal Citation105, pp. 1067-1075
Number of Pages9
Year2016
PublisherElsevier
Place of PublicationUnited Kingdom
ISSN1359-4311
1873-5606
Digital Object Identifier (DOI)https://doi.org/10.1016/j.applthermaleng.2016.01.049
Web Address (URL)http://www.sciencedirect.com/science/article/pii/S1359431116001046
Abstract

Cavitation phenomenon has found various industrial applications. The collapse process of a cavitation bubble is extremely violent in its final stage and the gas within the bubble can become extraordinarily hot. This paper introduces a heat transfer model to calculate accurately the temperature change and heat transfer during a bubble collapse based on the Rayleigh–Plesset (RP) equation and CFD modelling. To demonstrate the variations of pressure, temperature and velocity distribution in the liquid and bubble, a two-phase compressible CFD model developed to simulate the process of the bubble collapse. Results from the RP equation – modified with conduction and radiation effects – match the numerical CFD results very well. Further investigations were carried out on the bubble collapse and temperature increase, heat transfer rate by conduction and radiation, and accumulative heat transfer of bubbles with different bubble sizes. When a cavitation bubble with initial maximum radius of 2 mm collapses, the maximum temperature of the air can rise up over 0.02 mega degrees Kelvin (MK) and the transferred heat by radiation
and conduction accumulated in the first cycle of collapse can reach 40 micro-joules (μJ). The solution to the modified RP equation provides a practical method for the estimation of heat transfer and temperature increase in cavitation equipment.

Keywordsheat transfer; cavitation; conduction; radiation; CFD; bubble simulation; Rayleigh–Plesset equation
ANZSRC Field of Research 2020490399. Numerical and computational mathematics not elsewhere classified
Public Notes

Permanent restricted access to Published version in accordance with the copyright policy of the publisher.
Cavitation phenomenon has found various industrial applications. The collapse process of a cavitation
bubble is extremely violent in its final stage and the gas within the bubble can become extraordinarily
hot. This paper introduces a heat transfer model to calculate accurately the temperature change and heat
transfer during a bubble collapse based on the Rayleigh–Plesset (RP) equation and CFD modelling. To
demonstrate the variations of pressure, temperature and velocity distribution in the liquid and bubble,
a two-phase compressible CFD model developed to simulate the process of the bubble collapse. Results
from the RP equation – modified with conduction and radiation effects – match the numerical CFD results
very well. Further investigations were carried out on the bubble collapse and temperature increase, heat
transfer rate by conduction and radiation, and accumulative heat transfer of bubbles with different bubble
sizes. When a cavitation bubble with initial maximum radius of 2 mm collapses, the maximum temperature
of the air can rise up over 0.02 mega degrees Kelvin (MK) and the transferred heat by radiation
and conduction accumulated in the first cycle of collapse can reach 40 micro-joules (μJ). The solution to
the modified RP equation provides a practical method for the estimation of heat transfer and temperature
increase in cavitation equipment.

Byline AffiliationsCommonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
School of Civil Engineering and Surveying
Institution of OriginUniversity of Southern Queensland
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