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Surface switching statistics of rotating fluid: Disk-rim gap effects
| 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)
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Submitter: 田坂 裕司
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