Cargando…
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...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8879870/ https://www.ncbi.nlm.nih.gov/pubmed/35208327 http://dx.doi.org/10.3390/mi13020203 |
_version_ | 1784659020110364672 |
---|---|
author | Shang, Xiaopeng Huang, Xiaoyang |
author_facet | Shang, Xiaopeng Huang, Xiaoyang |
author_sort | Shang, Xiaopeng |
collection | PubMed |
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. |
format | Online Article Text |
id | pubmed-8879870 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-88798702022-02-26 Investigation of the Dynamics of Cavitation Bubbles in a Microfluidic Channel with Actuations Shang, Xiaopeng Huang, Xiaoyang Micromachines (Basel) Article 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. MDPI 2022-01-28 /pmc/articles/PMC8879870/ /pubmed/35208327 http://dx.doi.org/10.3390/mi13020203 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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/). |
spellingShingle | Article Shang, Xiaopeng Huang, Xiaoyang Investigation of the Dynamics of Cavitation Bubbles in a Microfluidic Channel with Actuations |
title | 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_short | 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 |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8879870/ https://www.ncbi.nlm.nih.gov/pubmed/35208327 http://dx.doi.org/10.3390/mi13020203 |
work_keys_str_mv | AT shangxiaopeng investigationofthedynamicsofcavitationbubblesinamicrofluidicchannelwithactuations AT huangxiaoyang investigationofthedynamicsofcavitationbubblesinamicrofluidicchannelwithactuations |