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Accession number;03A0164934
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| Title;Dynamics of a Surface Bump Generated by an Air-Water Free Surface Jet Impingement. |
| Author;
ZHENG J
(Kobe Univ., Kobe, Jpn)
KATAOKA K
(Kobe Univ., Kobe, Jpn)
YOSHIMURA T
(Kobe Univ., Kobe, Jpn)
OHMURA N
(Kobe Univ., Kobe, Jpn)
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Journal Title;J Chem Eng Jpn
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Journal Code:S0629A
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ISSN:0021-9592
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VOL.36;NO.2;PAGE.147-154(2003)
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| Figure&Table&Reference;FIG.13, TBL.1, REF.12 |
| Pub. Country;Japan |
| Language;English |
| Abstract;A submerged water jet impinging upon a free air-water surface has been investigated experimentally. The present work focuses on the dynamic deformation of the surface bump generated in the jet impingement region. The surface bump has a quake motion comprising two basic oscillations: fluttering motion(transversely) and swelling motion(vertically). The velocity measurement was made benath the bump with hot-wire anemometry. The motion of the geometrical stagnation point was analyzed with the aid of an image processing. It has been ascertained that a helical instability of the approaching jet is the origin of the fluttering motion of the surface bump and that the swelling motion is controlled by the large-scale vortical/turbulent structure of the approaching jet convected with phase velocity. (author abst.) |
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