Effects of Ultrasound on Behavior of Fine Solid Particles in a Solid-Liquid Mixture (Horizontal Irradiation in a Stationary Solid-Liquid Mixture)

Material type: 文書・図像類

Author: OHTA, Junichiほか

Publisher: 日本機械学会

Publication date: 2007-03

Material Format: Digital

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Note (General)：: In a solid-liquid two-phase flow,the separation of particles or a reduction of particle concentration is often desired. Utilization of ultrasound has ...

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Material Type: 文書・図像類
Title: Effects of Ultrasound on Behavior of Fine Solid Particles in a Solid-Liquid Mixture (Horizontal Irradiation in a Stationary Solid-Liquid Mixture)
Author/Editor: OHTA, Junichi
MAKARA, Takashi
HIROBE, Seisuke
Author Heading: OHTA, Junichi
MAKARA, Takashi
HIROBE, Seisuke
Publication, Distribution, etc.: 日本機械学会
Publication Date: 2007-03
Publication Date (W3CDTF): 2007-03
Periodical title: Journal of Fluid Science and Technology
No. or year of volume/issue: 2 1
Volume: 2
Issue: 1
Pages: 77-87
ISSN (Periodical Title): ISSN : 1880-5558
Text Language Code: eng
Subject Heading: Multiphase Flow
Ultrasonic Wave
Radiation Force
Separation
Target Audience: 一般
Note (General): In a solid-liquid two-phase flow,the separation of particles or a reduction of particle concentration is often desired. Utilization of ultrasound has been considered as one technique for the separation of particles. Particles are known to aggregate due to the radiation pressure of ultrasound. However,the effect of ultrasound including cavitation on particle behavior is not well understood. Thus,we horizontally irradiated water with aluminum particles having a density of 2720 kg/〓 and diameters of 50 to 150 µm or smaller aluminum powder(flakes)in a rectangular vessel by ultrasound at frequencies of 23 kHz or 100 kHz. In this way,a standing wave was formed. The following results were obtained. For ultrasound of 100 kHz,the aluminum powder aggregates in vertical bands. When acoustic cavitation existed at the frequency of 23 kHz,we noticed that the aluminum particles aggregate as clumps near antinodes of the sound pressure profile because of the flow induced by acoustic cavitation. When the particles are continuously provided in a relatively high concentration,particle clumps form and remain. Then,the particle clumps become larger and suddenly fall faster than the surrounding small particles. Such phenomena repeat themselves periodically. At relatively low concentrations,particle climps do not become large and remain stationary at the same positions.
Source: https://u-fukui.repo.nii.ac.jp/?action=repository_action_common_download&item_id=22256&item_no=1&attribute_id=22&file_no=1
https://u-fukui.repo.nii.ac.jp/?action=repository_action_common_download&item_id=22256&item_no=1&attribute_id=22&file_no=1
Access Restrictions: 限定公開
Rights (production): 〓 2007 日本機械学会
Related Material (DOI): 10.1299/jfst.2.77
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ