Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/25289
Title: Multiscale interactions of liquid, bubbles and solid phases in ultrasonic fields revealed by multiphysics modelling and ultrafast X-ray imaging
Authors: Qin, L
Porfyrakis, K
Tzanakis, I
Grobert, N
Eskin, DG
Fezzaa, K
Mi, J
Keywords: multiphysics modelling;ultrasonic bubble dynamics;ultrasound materials processing;liquid-bubble-solid interaction;Synchrotron X-ray imaging
Issue Date: 6-Sep-2022
Publisher: Elsevier BV
Citation: Qin, L. et al. (2022) 'Multiscale interactions of liquid, bubbles and solid phases in ultrasonic fields revealed by multiphysics modelling and ultrafast X-ray imaging', Ultrasonics Sonochemistry, 89, 106158, pp. 1 - 11. doi: 10.1016/j.ultsonch.2022.106158.
Abstract: Copyright © 2022 The Authors. The volume of fluid (VOF) and continuous surface force (CSF) methods were used to develop a bubble dynamics model for the simulation of bubble oscillation and implosion dynamics under ultrasound. The model was calibrated and validated by the X-ray image data acquired by ultrafast synchrotron X-ray. Coupled bubble interactions with bulk graphite and freely moving particles were also simulated based on the validated model. Simulation and experiments quantified the surface instability developed along the bubble surface under the influence of ultrasound pressure fields. Once the surface instability exceeds a certain amplitude, bubble implosion occurs, creating shock waves and highly deformed, irregular gas-liquid boundaries and smaller bubble fragments. Bubble implosion can produce cyclic impulsive stresses sufficient enough to cause µs fatigue exfoliation of graphite layers. Bubble-particle interaction simulations reveal the underlying mechanisms for efficient particle dispersion or particle wrapping which are all strongly related to the oscillation dynamics of the bubbles and the particle surface properties.
Description: Data availability: Data will be made available on request. Appendix A. Supplementary data: Supplementary data to this article can be found online at: https://doi.org/10.1016/j.ultsonch.2022.106158.
URI: https://bura.brunel.ac.uk/handle/2438/25289
DOI: https://doi.org/10.1016/j.ultsonch.2022.106158
ISSN: 1350-4177
Other Identifiers: 106158
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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