Kinetics of Cavitation Bubble in Ultrasonic Degassing of Casting Aluminium Alloy

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Important Dates

Conference:

Apr. 22-24, 2019

Full Paper Due: Mar. 18, 2019

Abstract Due: Mar. 18, 2019

Audience Registration Due:
Apr. 22, 2019

Presentations of The Spring World Congress on Engineering and Technology (SCET 2017)

● Kinetics of Cavitation Bubble in Ultrasonic Degassing of Casting Aluminium Alloy
Author(s)
Miao Liu
Affiliation(s)
Shandong University, Weihai
KEYWORDS
Kinetics, Cavitation Bubble, Ultrasonic Degassing, Casting Aluminium Alloy
ABSTRACT
Severe regassing was detected by previous experiment on degassing method for aluminium-silicon alloy by injecting argon with rotation. In order to further degas, ultrasonic degassing was adopted. To describe the cavitation bubbles’ movement, traditional Rayleigh-Plesset equation was modified. Classic Rayleigh-Plesset equation is strongly restricted by the applicable condition that the centre of the bubble is fixed. In this paper, a position-related Rayleigh-Plesset equation is proposed to describe the cavitation bubble’s floating movement in aluminium-silicon alloy of 750℃ with the coefficient of viscosity of 0.0012. As the calculation results, a bubble stimulated by high-low-frequency vibration can float up faster with violent vibration.