2014 Fiscal Year Final Research Report
Multiscale analysis for controlling interface shape of gas-liquid micro flow systems
| Project/Area Number |
24560185
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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 | Osaka University (2014)
Institute of Physical and Chemical Research (2012-2013) |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 数値流体力学 |
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| Outline of Final Research Achievements |
Numerical methods for simulating an interface deformation and a bubble formation in a gas-liquid micro flow system has been equipped. In consideration of the liquid inertia, the basic equations, we employed, consist of the Laplace law and the two-dimensional Euler-Darcy equation under the assumption of Hele-Shaw's flow owing to a large width-to-thickness aspect ratio of the microchannel. The equations are numerically solved by means of a boundary element method, and the temporal change in the profile of the gas-liquid interface is captured. The simulated results in a T-shaped microchannel, which consists of two inlets for gas and liquid and a outlet for gas-liquid mixture, well reproduce the experimentally observed behaviors that the interface pinches off at the channel junction and then a bubble forms, and imply the relevance of the liquid inertia to the bubble formation.
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| Free Research Field |
工学
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