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Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies
Filling microstructures in the air with liquid or removing trapped gases from a surface in a liquid are required in processes such as cleaning, bonding, and painting. However, it is difficult to deform the gas–liquid interface to fill a small hole with liquid when surface tension has closed one end....
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8779578/ https://www.ncbi.nlm.nih.gov/pubmed/35056274 http://dx.doi.org/10.3390/mi13010109 |
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author | Matsumoto, Yuta Mizushima, Yuki Sanada, Toshiyuki |
author_facet | Matsumoto, Yuta Mizushima, Yuki Sanada, Toshiyuki |
author_sort | Matsumoto, Yuta |
collection | PubMed |
description | Filling microstructures in the air with liquid or removing trapped gases from a surface in a liquid are required in processes such as cleaning, bonding, and painting. However, it is difficult to deform the gas–liquid interface to fill a small hole with liquid when surface tension has closed one end. Therefore, it is necessary to have an efficient method of removing gas from closed-end holes in liquids. Here, we demonstrate the gas-removing method using acoustic waves from small holes. We observed gas column oscillation by changing the hole size, wettability, and liquid surface tension to clarify the mechanism. First, we found that combining two different frequencies enabled complete gas removal in water within 2 s. From high-speed observation, about half of the removal was dominated by droplet or film formation caused by oscillating the gas column. The other half was dominated by approaching and coalescing the divided gas column. We conclude that the natural frequency of both the air column and the bubbles inside the tube are important. |
format | Online Article Text |
id | pubmed-8779578 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-87795782022-01-22 Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies Matsumoto, Yuta Mizushima, Yuki Sanada, Toshiyuki Micromachines (Basel) Article Filling microstructures in the air with liquid or removing trapped gases from a surface in a liquid are required in processes such as cleaning, bonding, and painting. However, it is difficult to deform the gas–liquid interface to fill a small hole with liquid when surface tension has closed one end. Therefore, it is necessary to have an efficient method of removing gas from closed-end holes in liquids. Here, we demonstrate the gas-removing method using acoustic waves from small holes. We observed gas column oscillation by changing the hole size, wettability, and liquid surface tension to clarify the mechanism. First, we found that combining two different frequencies enabled complete gas removal in water within 2 s. From high-speed observation, about half of the removal was dominated by droplet or film formation caused by oscillating the gas column. The other half was dominated by approaching and coalescing the divided gas column. We conclude that the natural frequency of both the air column and the bubbles inside the tube are important. MDPI 2022-01-10 /pmc/articles/PMC8779578/ /pubmed/35056274 http://dx.doi.org/10.3390/mi13010109 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 Matsumoto, Yuta Mizushima, Yuki Sanada, Toshiyuki Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies |
title | Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies |
title_full | Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies |
title_fullStr | Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies |
title_full_unstemmed | Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies |
title_short | Removing Gas from a Closed-End Small Hole by Irradiating Acoustic Waves with Two Frequencies |
title_sort | removing gas from a closed-end small hole by irradiating acoustic waves with two frequencies |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8779578/ https://www.ncbi.nlm.nih.gov/pubmed/35056274 http://dx.doi.org/10.3390/mi13010109 |
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