2013 Fiscal Year Final Research Report
A study on the formation of higher-order flow-induced structured phase from wormlike micelles in surfactant solutions at high shear rates
| Project/Area Number |
23560187
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Chiba University |
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Principal Investigator |
MIKAMI Fumihiko 千葉大学, 工学(系)研究科(研究院), 准教授 (40272348)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 複雑流体 / マイクロ流 / ひも状ミセル水溶液 / 高次構造体 / 流れの可視化 / 位相差顕微鏡 / 偏光 |
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| Research Abstract |
Flow patterns and a formation of higher-order flow-induced structured phase are investigated experimentally in the microchannel under a high shear rate flow of wormlike micelle solutions past arrays of microposts. The viscous streaks of higher-order structured phase formed in the flow were observed directly with a phase-contrast microscopy. With increase in flow rate, the starting point of higher-order structured phase formation is shifted to more upstream position in the channel until a critical flow rate is reached. Steady flow patterns are observed at lower flow rates, which are altered drastically as flow rate increases accompanied by a pulsating entry flow with narrow path into the gap between microposts.
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