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Surface switching statistics of rotating fluid: Disk-rim gap effects

PhysRevE.95.043113.pdf903.07 kBPDF見る/開く

タイトル: Surface switching statistics of rotating fluid: Disk-rim gap effects
著者: Tasaka, Yuji 著作を一覧する
Iima, Makoto 著作を一覧する
発行日: 2017年 4月27日
出版者: American Physical Society (APS)
誌名: Physical review E
巻: 95
号: 4
開始ページ: 43113
出版社 DOI: 10.1103/PhysRevE.95.043113
抄録: We examined the influence of internal noise on the irregular switching of the shape of the free surface of fluids in an open cylindrical vessel driven by a bottom disk rotating at constant speed [Suzuki, Iima, and Hayase, Phys. Fluids 18, 101701 (2006)]. A slight increase in the disk-rim gap (less than 3% of the disk radius) was established experimentally to cause significant changes in this system, specifically, frequent appearance of the surface descending event connecting a nonaxisymmetric shape in strong mixing flow (turbulent flow) and an axisymmetric shape in laminar flow, as well as a shift in critical Reynolds number that define the characteristic states. The physical mechanism underlying the change is analyzed in terms of flow characteristics in the disk-rim gap, which acts as a noise source, and a mathematical model established from measurements of the surface height fluctuations with noise term.
Rights: ©2017 American Physical Society
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 田坂 裕司


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