Effect of cylinders on the characteristics of a fine-bubble plume
The characteristics of a fine-bubble plume passing through two tandem cylinders are investigated. Fine-bubbles with a mean diameter of 0.055 mm are released by water electrolysis from electrodes placed at the bottom of a tank. They induce an upward water flow around them with rising due to buoyancy....
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2020-09-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/15/3/15_2020jfst0019/_pdf/-char/en |
| _version_ | 1818753286563430400 |
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| author | Kotaro TAKAMURE Tomohiro DEGAWA Ryota KANO Tomomi UCHIYAMA |
| author_facet | Kotaro TAKAMURE Tomohiro DEGAWA Ryota KANO Tomomi UCHIYAMA |
| author_sort | Kotaro TAKAMURE |
| collection | DOAJ |
| description | The characteristics of a fine-bubble plume passing through two tandem cylinders are investigated. Fine-bubbles with a mean diameter of 0.055 mm are released by water electrolysis from electrodes placed at the bottom of a tank. They induce an upward water flow around them with rising due to buoyancy. Orthogonally to the axis of such fine–bubble plume, two cylinders with a diameter D of 30 mm are arranged in tandem. The distance between the cylinders, L, ranges between 1.5D and 3D. This study visualizes the bubbles and water flow around the cylinders. It also measures the bubble velocity distribution. The experiments reveal the water and bubble shear layers originating at the sides of the lower cylinder and make clear their behavior around the upper cylinder. This study elucidates the effects of L on the characteristics of the fine-bubble plume, such as the stagnant bubbly flow and the bubbly wake around the cylinders. |
| first_indexed | 2024-12-18T05:04:57Z |
| format | Article |
| id | doaj.art-eb1c9dda339140ad9e1864de6f6b7a43 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-12-18T05:04:57Z |
| publishDate | 2020-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-eb1c9dda339140ad9e1864de6f6b7a432022-12-21T21:20:03ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582020-09-01153JFST0019JFST001910.1299/jfst.2020jfst0019jfstEffect of cylinders on the characteristics of a fine-bubble plumeKotaro TAKAMURE0Tomohiro DEGAWA1Ryota KANO2Tomomi UCHIYAMA3Institute of Materials and Systems for Sustainability, Nagoya UniversityInstitute of Materials and Systems for Sustainability, Nagoya UniversityBrother Industries, Ltd.Institute of Materials and Systems for Sustainability, Nagoya UniversityThe characteristics of a fine-bubble plume passing through two tandem cylinders are investigated. Fine-bubbles with a mean diameter of 0.055 mm are released by water electrolysis from electrodes placed at the bottom of a tank. They induce an upward water flow around them with rising due to buoyancy. Orthogonally to the axis of such fine–bubble plume, two cylinders with a diameter D of 30 mm are arranged in tandem. The distance between the cylinders, L, ranges between 1.5D and 3D. This study visualizes the bubbles and water flow around the cylinders. It also measures the bubble velocity distribution. The experiments reveal the water and bubble shear layers originating at the sides of the lower cylinder and make clear their behavior around the upper cylinder. This study elucidates the effects of L on the characteristics of the fine-bubble plume, such as the stagnant bubbly flow and the bubbly wake around the cylinders.https://www.jstage.jst.go.jp/article/jfst/15/3/15_2020jfst0019/_pdf/-char/enfine-bubble plumetwo tandem cylindersshear layerwakeexperiment |
| spellingShingle | Kotaro TAKAMURE Tomohiro DEGAWA Ryota KANO Tomomi UCHIYAMA Effect of cylinders on the characteristics of a fine-bubble plume Journal of Fluid Science and Technology fine-bubble plume two tandem cylinders shear layer wake experiment |
| title | Effect of cylinders on the characteristics of a fine-bubble plume |
| title_full | Effect of cylinders on the characteristics of a fine-bubble plume |
| title_fullStr | Effect of cylinders on the characteristics of a fine-bubble plume |
| title_full_unstemmed | Effect of cylinders on the characteristics of a fine-bubble plume |
| title_short | Effect of cylinders on the characteristics of a fine-bubble plume |
| title_sort | effect of cylinders on the characteristics of a fine bubble plume |
| topic | fine-bubble plume two tandem cylinders shear layer wake experiment |
| url | https://www.jstage.jst.go.jp/article/jfst/15/3/15_2020jfst0019/_pdf/-char/en |
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