Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation
It is well known that ultrasonic cavitation causes a steady flow termed acoustic streaming. In the present study, the velocity of acoustic streaming in water and molten aluminum is measured. The method is based on the measurement of oscillation frequency of Karman vortices around a cylinder immersed...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-03-01
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| Series: | Ultrasonics Sonochemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417720316850 |
| _version_ | 1819146920445083648 |
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| author | Takuya Yamamoto Kazuki Kubo Sergey V. Komarov |
| author_facet | Takuya Yamamoto Kazuki Kubo Sergey V. Komarov |
| author_sort | Takuya Yamamoto |
| collection | DOAJ |
| description | It is well known that ultrasonic cavitation causes a steady flow termed acoustic streaming. In the present study, the velocity of acoustic streaming in water and molten aluminum is measured. The method is based on the measurement of oscillation frequency of Karman vortices around a cylinder immersed into liquid. For the case of acoustic streaming in molten metal, such measurements were performed for the first time. Four types of experiments were conducted in the present study: (1) Particle Image Velocimetry (PIV) measurement in a water bath to measure the acoustic streaming velocity visually, (2) frequency measurement of Karman vortices generated around a cylinder in water, and (3) in aluminum melt, and (4) cavitation intensity measurements in molten aluminum. Based on the measurement results (1) and (2), the Strouhal number for acoustic streaming was determined. Then, using the same Strouhal number and measuring oscillation frequency of Karman vortices in aluminum melt, the acoustic streaming velocity was measured. The velocity of acoustic streaming was found to be independent of amplitude of sonotrode tip oscillation both in water and aluminum melt. This can be explained by the effect of acoustic shielding and liquid density. |
| first_indexed | 2024-12-22T13:21:35Z |
| format | Article |
| id | doaj.art-699b03dafb384c2dbffd475b7d3eb5e9 |
| institution | Directory Open Access Journal |
| issn | 1350-4177 |
| language | English |
| last_indexed | 2024-12-22T13:21:35Z |
| publishDate | 2021-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj.art-699b03dafb384c2dbffd475b7d3eb5e92022-12-21T18:24:27ZengElsevierUltrasonics Sonochemistry1350-41772021-03-0171105381Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiationTakuya Yamamoto0Kazuki Kubo1Sergey V. Komarov2Department of Metallurgy, Tohoku University, Miyagi 980-8579, Japan; Graduate School of Environmental Studies, Tohoku University, Miyagi 980-8579, Japan; Corresponding author at: Department of Metallurgy, Tohoku University, Miyagi 980-8579, Japan.Graduate School of Environmental Studies, Tohoku University, Miyagi 980-8579, JapanDepartment of Metallurgy, Tohoku University, Miyagi 980-8579, Japan; Graduate School of Environmental Studies, Tohoku University, Miyagi 980-8579, JapanIt is well known that ultrasonic cavitation causes a steady flow termed acoustic streaming. In the present study, the velocity of acoustic streaming in water and molten aluminum is measured. The method is based on the measurement of oscillation frequency of Karman vortices around a cylinder immersed into liquid. For the case of acoustic streaming in molten metal, such measurements were performed for the first time. Four types of experiments were conducted in the present study: (1) Particle Image Velocimetry (PIV) measurement in a water bath to measure the acoustic streaming velocity visually, (2) frequency measurement of Karman vortices generated around a cylinder in water, and (3) in aluminum melt, and (4) cavitation intensity measurements in molten aluminum. Based on the measurement results (1) and (2), the Strouhal number for acoustic streaming was determined. Then, using the same Strouhal number and measuring oscillation frequency of Karman vortices in aluminum melt, the acoustic streaming velocity was measured. The velocity of acoustic streaming was found to be independent of amplitude of sonotrode tip oscillation both in water and aluminum melt. This can be explained by the effect of acoustic shielding and liquid density.http://www.sciencedirect.com/science/article/pii/S1350417720316850Acoustic streamingAcoustic cavitationVortex shedding frequencyAluminum meltUltrasound irradiationKarman vortex |
| spellingShingle | Takuya Yamamoto Kazuki Kubo Sergey V. Komarov Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation Ultrasonics Sonochemistry Acoustic streaming Acoustic cavitation Vortex shedding frequency Aluminum melt Ultrasound irradiation Karman vortex |
| title | Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation |
| title_full | Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation |
| title_fullStr | Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation |
| title_full_unstemmed | Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation |
| title_short | Characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation |
| title_sort | characterization of acoustic streaming in water and aluminum melt during ultrasonic irradiation |
| topic | Acoustic streaming Acoustic cavitation Vortex shedding frequency Aluminum melt Ultrasound irradiation Karman vortex |
| url | http://www.sciencedirect.com/science/article/pii/S1350417720316850 |
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