Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations

This work presents experimental and numerical studies on the dynamics of cavitation bubbles in a nozzle-shaped microfluidic channel with PZT (lead-zirconate-titanate) actuations. It is found that a cloud of bubbles can be generated near the center of the microfluidic channel when the actuation volta...

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Main Authors: Shang, Xiaopeng, Huang, Xiaoyang
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/161022
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1610222022-08-11T08:58:17Z Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations Shang, Xiaopeng Huang, Xiaoyang School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Bubble Dynamics Coalescence This work presents experimental and numerical studies on the dynamics of cavitation bubbles in a nozzle-shaped microfluidic channel with PZT (lead-zirconate-titanate) actuations. It is found that a cloud of bubbles can be generated near the center of the microfluidic channel when the actuation voltage is larger than a threshold at 1 kHz. After being generated, the bubbles under actuations oscillate radially with violent expansion and compression, and simultaneously translate upstream towards the opening of the nozzle. Along with radial oscillation and translation, the bubbles undergo frequent and drastic coalescence and breakup, leading to vigorous churning of surrounding liquids. The pressure variation and distribution in the microchannel are calculated by numerical simulation in Ansys Fluent, and results show that there is a low-pressure zone inside the microfluidic channel within each cycle of the actuation period, which is responsible for bubble generation observed in the experiments. The method of bubble generation in this study is novel and can be applied for the enhancement of heat and mass transfer in microfluidic operations. Published version 2022-08-11T08:58:17Z 2022-08-11T08:58:17Z 2022 Journal Article Shang, X. & Huang, X. (2022). Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations. Micromachines, 13(2), 203-. https://dx.doi.org/10.3390/mi13020203 2072-666X https://hdl.handle.net/10356/161022 10.3390/mi13020203 35208327 2-s2.0-85124067366 2 13 203 en Micromachines © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
Bubble Dynamics
Coalescence
spellingShingle Engineering::Mechanical engineering
Bubble Dynamics
Coalescence
Shang, Xiaopeng
Huang, Xiaoyang
Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations
description This work presents experimental and numerical studies on the dynamics of cavitation bubbles in a nozzle-shaped microfluidic channel with PZT (lead-zirconate-titanate) actuations. It is found that a cloud of bubbles can be generated near the center of the microfluidic channel when the actuation voltage is larger than a threshold at 1 kHz. After being generated, the bubbles under actuations oscillate radially with violent expansion and compression, and simultaneously translate upstream towards the opening of the nozzle. Along with radial oscillation and translation, the bubbles undergo frequent and drastic coalescence and breakup, leading to vigorous churning of surrounding liquids. The pressure variation and distribution in the microchannel are calculated by numerical simulation in Ansys Fluent, and results show that there is a low-pressure zone inside the microfluidic channel within each cycle of the actuation period, which is responsible for bubble generation observed in the experiments. The method of bubble generation in this study is novel and can be applied for the enhancement of heat and mass transfer in microfluidic operations.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Shang, Xiaopeng
Huang, Xiaoyang
format Article
author Shang, Xiaopeng
Huang, Xiaoyang
author_sort Shang, Xiaopeng
title Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations
title_short Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations
title_full Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations
title_fullStr Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations
title_full_unstemmed Investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations
title_sort investigation of the dynamics of cavitation bubbles in a microfluidic channel with actuations
publishDate 2022
url https://hdl.handle.net/10356/161022
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