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

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/66177

Title: Surface switching statistics of rotating fluid: Disk-rim gap effects
Authors: Tasaka, Yuji Browse this author →KAKEN DB
Iima, Makoto Browse this author →KAKEN DB
Issue Date: 27-Apr-2017
Publisher: American Physical Society (APS)
Journal Title: Physical review E
Volume: 95
Issue: 4
Start Page: 43113
Publisher DOI: 10.1103/PhysRevE.95.043113
PMID: 28505752
Abstract: 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
Type: article
URI: http://hdl.handle.net/2115/66177
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田坂 裕司

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