2011 Fiscal Year Final Research Report
Effects of Non-Newtonian viscosity and Marangoni on producing of capsules by using a compound jet
| Project/Area Number |
21560177
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | 非線形 / 表面張力 / ジェット / 非ニュートン粘性 / マランゴニー / 崩壊 / カプセル / 不安定 |
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| Research Abstract |
On producing liquid micro-capsules by using a compound liquid jet which consists of core and annular phases, effects of non-Newtonian viscosity in a polymer liquid and Marangoni effects due to locally varying concentration of a surfactant are investigated. In particular, disintegrations of the annular phase due to the ballooning phenomena appearing in a low Reynolds number region become worse when the viscosity is pseudo-plastic comparing with Newtonian and dilatant, except for sufficiently low Weber numbers and inner surface tension.
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