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NUMERICAL INVESTIGATION OF AN OSCILLATING GAS BUBBLE IN AN ULTRASONIC FIELD

In English

Författare

Summary, in English

The discovery of acoustic cavitation phenomenon is an important role in the design of a wide range of devices handling liquids and it has led to a renewed interest in the bubble dynamics in a sound field.In this study, the nonlinear behaviour of individual gas bubble in liquid under the action of ultrasound fields has been analysed, and simulated results of formation and collapse of a bubble have been provided.

The characterization of acoustic cavitation bubbles under theinfluence of periodic pressure field, e.g., the motion of the bubble surface, pressure, temperature and density fields inside the bubble have been investigated and the results are compared with experimental data. The numerically calculated results reveal that the assumption of polytropic approximation inside the bubble predicts that a radius-time curve does not fit to the observed data. Also, the results indicate that the pressure gradient and the heat transfer inside the bubble and across the bubble surface play a major role to predict the extreme conditions associated with the bubble collapse.

Avdelning/ar

Publiceringsår

2014

Språk

Engelska

Dokumenttyp

Konferensbidrag

Ämne

  • Energy Engineering

Conference name

10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics

Conference date

2014-07-14 - 2014-07-16

Conference place

Orlando, Florida, United States

Status

Published