Comparison between low-order and high-order acoustic pressure solvers for bubbly media computations

9th International Symposium on Cavitation

Lebon, G.S. Bruno^1 ; Tzanakis, I.^2 ; Pericleous, K.A.^1 ; Eskin, D.G.^2

Centre for Numerical Modelling and Process Analysis, University of Greenwich, London

SE10 9ET, United Kingdom^1

Brunel Centre for Advanced Solidification Technology, Brunel University, Uxbridge, Middlesex

UB8 3PH, United Kingdom^2

关键词: Acoustic cavitations;    Acoustic pressures;    Acoustic treatment;    Discretization scheme;    Fourth-order scheme;    Fundamental studies;    Metallic material;    Second-order scheme;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012134/pdf
DOI  :  10.1088/1742-6596/656/1/012134

来源: IOP

【 摘 要 】

Numerical modelling is a useful tool for the fundamental study of acoustic cavitation treatment in liquid metals. This treatment, also known as ultrasonic melt processing, significantly improves the properties and quality of metallic materials. However, the mechanisms leading to these observed improvements are still unclear and a fundamental study of cavitation treatment is required to understand this process. In this endeavour, this paper compares the use of high-order discretization schemes for solving acoustic pressures in cavitating liquids with its low-order counterpart. A fourth order scheme is shown to be more stable and accurate than a second order scheme when taking into account the acceleration of bubbles before their collapse, and is recommended for the full cavitation modelling of acoustic treatment of liquid metals.