CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation)
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| Formato: | Artículo publishedVersion |
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ACS Publications
2026
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| Acceso en línea: | http://repositorio.ungs.edu.ar:8080/xmlui/handle/UNGS/2732 |
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I71-R177-UNGS-2732 |
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I71-R177-UNGS-27322026-01-15T21:08:06Z CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation) D´Onofrio, Alejandro Gustavo Freytes, V. M. Microbubbles Silicone Oil CO2 Frequency of Formation Ingeniería del Medio Ambiente Revista con referato Fil: D'Onofrio, Alejandro Gustavo. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina. Fil: D'Onofrio, Alejandro Gustavo. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Física. Grupo de Medios Porosos; Argentina. Fil: D'Onofrio, Alejandro Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. The objective of this work is the study of gas microbubble dissolution in a carrier liquid. To achieve this, we will analyze, using microfluidic techniques, the formation and evolution of carbon dioxide (CO2) gas microbubbles in silicone oil, monitoring the size, position, and distance between the formed bubbles as they advance through a microchannel. This work consists of two parts (Part I and Part II): in Part I, we analyze the mechanisms determining the variation in the spatial frequency of bubbles as they move through the microchannel, while Part II examines the evolution of their size and demonstrates the utility of the device for obtaining diffusion coefficients and Henry’s constant for the gases used. The microchip containing the microchannels has a serpentine shape, allowing extensive bubble trajectories to be captured in a single image. Regarding the study of bubble spatial frequency (Part I), it was found to exhibit three regimes during its displacement through the microchannel. Initially, the frequency increases because the bubbles block the microchannel, preventing liquid transfer through the residual film formed between the channel wall and the gas. Then, there is a transition stage during which the liquid manages to penetrate the residual film due to a local increase in pressure gradient. The pressure gradient overcomes the reduction in film thickness due to the decrease in carrier phase flow rate, which is affected by gas dissolution in the liquid. Therefore, the frequency begins to stabilize until the bubbles lose contact with the microchannel wall and assume a spherical shape, being transported at the carrier liquid velocity. These studies contribute to the understanding of transport phenomena and interfaces in CO2 foams in oils, which are of great interest in industries such as oil recovery and refrigerants. 2026-01-15T21:08:06Z 2026-01-15T21:08:06Z 2024 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion D´Onofrio, A. G. y Freytes, V. M. (2024). CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation). Langmuir, 41(2), 1197-1206. 0743-7463 http://repositorio.ungs.edu.ar:8080/xmlui/handle/UNGS/2732 eng http://dx.doi.org/10.1021/acs.langmuir.4c02019 info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf ACS Publications Langmuir. Nov. 2024; 41(2): 1197-1206 https://pubs.acs.org/toc/langd5/41/2?ref=breadcrumb |
| institution |
Universidad Nacional de General Sarmiento |
| institution_str |
I-71 |
| repository_str |
R-177 |
| collection |
Repositorio Institucional Digital de Acceso Abierto (UNGS) |
| language |
Inglés |
| orig_language_str_mv |
eng |
| topic |
Microbubbles Silicone Oil CO2 Frequency of Formation Ingeniería del Medio Ambiente |
| spellingShingle |
Microbubbles Silicone Oil CO2 Frequency of Formation Ingeniería del Medio Ambiente D´Onofrio, Alejandro Gustavo Freytes, V. M. CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation) |
| topic_facet |
Microbubbles Silicone Oil CO2 Frequency of Formation Ingeniería del Medio Ambiente |
| description |
Revista con referato |
| format |
Artículo Artículo publishedVersion |
| author |
D´Onofrio, Alejandro Gustavo Freytes, V. M. |
| author_facet |
D´Onofrio, Alejandro Gustavo Freytes, V. M. |
| author_sort |
D´Onofrio, Alejandro Gustavo |
| title |
CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation) |
| title_short |
CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation) |
| title_full |
CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation) |
| title_fullStr |
CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation) |
| title_full_unstemmed |
CO2 Microbubbles in Silicone Oil (Part I: Study of the Frequency of Formation) |
| title_sort |
co2 microbubbles in silicone oil (part i: study of the frequency of formation) |
| publisher |
ACS Publications |
| publishDate |
2026 |
| url |
http://repositorio.ungs.edu.ar:8080/xmlui/handle/UNGS/2732 |
| work_keys_str_mv |
AT donofrioalejandrogustavo co2microbubblesinsiliconeoilpartistudyofthefrequencyofformation AT freytesvm co2microbubblesinsiliconeoilpartistudyofthefrequencyofformation |
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1858615786864640000 |