Visualization of gas–liquid mass transfer and wake structure of rising bubbles using pH-sensitive PLIF
A planar laser-induced fluorescence (PLIF) technique for visualizing gas–liquid mass transfer and wake structure of rising gas bubbles is described. The method uses an aqueous solution of the pH-sensitive dye Naphthofluorescein and CO2 as a tracer gas. It features a high spatial resolution and frame...
| Main Authors: | , , |
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| Format: | Article |
| Language: | en_US |
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Springer Science + Business Media B.V.
2011
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| Online Access: | http://hdl.handle.net/1721.1/63149 |
| _version_ | 1826205550170341376 |
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| author | Stohr, M. Schanze, Julian Johannes Khalili, Arzhang |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Stohr, M. Schanze, Julian Johannes Khalili, Arzhang |
| author_sort | Stohr, M. |
| collection | MIT |
| description | A planar laser-induced fluorescence (PLIF) technique for visualizing gas–liquid mass transfer and wake structure of rising gas bubbles is described. The method uses an aqueous solution of the pH-sensitive dye Naphthofluorescein and CO2 as a tracer gas. It features a high spatial resolution and frame rates of up to 500 Hz, providing the ability to capture cinematographic image sequences. By steering the laser beam with a set of two programmable scanning mirrors, sequences of three-dimensional LIF images can be recorded. The technique is applied to freely rising bubbles with diameters between 0.5 and 5 mm, which perform rectilinear, oscillatory or irregular motions. The resulting PLIF image sequences reveal the evolution of characteristic patterns in the near and far wake of the bubbles and prove the potential of the technique to provide new and detailed insights into the spatio-temporal dynamics of mass transfer of rising gas bubbles. The image sequences further allow the estimation of bubble size and rise velocity. The analysis of bubble rise velocities in the Naphthofluorescein solution indicates that surfactant-contaminated conditions are encountered. |
| first_indexed | 2024-09-23T13:15:14Z |
| format | Article |
| id | mit-1721.1/63149 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:15:14Z |
| publishDate | 2011 |
| publisher | Springer Science + Business Media B.V. |
| record_format | dspace |
| spelling | mit-1721.1/631492022-09-28T12:55:37Z Visualization of gas–liquid mass transfer and wake structure of rising bubbles using pH-sensitive PLIF Stohr, M. Schanze, Julian Johannes Khalili, Arzhang Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Schanze, Julian Johannes Schanze, Julian Johannes A planar laser-induced fluorescence (PLIF) technique for visualizing gas–liquid mass transfer and wake structure of rising gas bubbles is described. The method uses an aqueous solution of the pH-sensitive dye Naphthofluorescein and CO2 as a tracer gas. It features a high spatial resolution and frame rates of up to 500 Hz, providing the ability to capture cinematographic image sequences. By steering the laser beam with a set of two programmable scanning mirrors, sequences of three-dimensional LIF images can be recorded. The technique is applied to freely rising bubbles with diameters between 0.5 and 5 mm, which perform rectilinear, oscillatory or irregular motions. The resulting PLIF image sequences reveal the evolution of characteristic patterns in the near and far wake of the bubbles and prove the potential of the technique to provide new and detailed insights into the spatio-temporal dynamics of mass transfer of rising gas bubbles. The image sequences further allow the estimation of bubble size and rise velocity. The analysis of bubble rise velocities in the Naphthofluorescein solution indicates that surfactant-contaminated conditions are encountered. 2011-05-31T18:58:44Z 2011-05-31T18:58:44Z 2009-03 2008-12 Article http://purl.org/eprint/type/JournalArticle 0723-4864 1432-1114 http://hdl.handle.net/1721.1/63149 Stöhr, M., J. Schanze, and A. Khalili. “Visualization of Gas–liquid Mass Transfer and Wake Structure of Rising Bubbles Using pH-sensitive PLIF.” Experiments in Fluids 47.1 (2009) : 135-143-143. en_US http://dx.doi.org/10.1007/s00348-009-0633-6 Experiments in Fluids Creative Commons Attribution Noncommercial License http://creativecommons.org/licenses/by-nc/2.5 application/pdf Springer Science + Business Media B.V. Springer |
| spellingShingle | Stohr, M. Schanze, Julian Johannes Khalili, Arzhang Visualization of gas–liquid mass transfer and wake structure of rising bubbles using pH-sensitive PLIF |
| title | Visualization of gas–liquid mass transfer and wake structure of rising bubbles using pH-sensitive PLIF |
| title_full | Visualization of gas–liquid mass transfer and wake structure of rising bubbles using pH-sensitive PLIF |
| title_fullStr | Visualization of gas–liquid mass transfer and wake structure of rising bubbles using pH-sensitive PLIF |
| title_full_unstemmed | Visualization of gas–liquid mass transfer and wake structure of rising bubbles using pH-sensitive PLIF |
| title_short | Visualization of gas–liquid mass transfer and wake structure of rising bubbles using pH-sensitive PLIF |
| title_sort | visualization of gas liquid mass transfer and wake structure of rising bubbles using ph sensitive plif |
| url | http://hdl.handle.net/1721.1/63149 |
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