2020 Fiscal Year Annual Research Report
3-D shape measurement of liquid film and gas bubble of slug flow in microchannels with axial plane optical microscopy
| Project/Area Number |
18K13680
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| Research Institution | Ibaraki University |
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Principal Investigator |
李 艶栄 茨城大学, 理工学研究科(工学野), 准教授 (20712821)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | APOM / Slug flow / Two phase flow |
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| Outline of Annual Research Achievements |
Research on the improvement of efficiency and refinement of chemical reactions have been promoted in the fields of chemistry and engineering in recent years. According to previous research, mixing of substances is promoted compared to the conventional device, because the fluid is less susceptible to gravity force in the microscale channels. Although research on two phase flow has been developed, there are still few studies on gas-liquid, liquid-liquid two-phase flow compared to research on solid-liquid, and solid-gas multiphase flow, and the slug length of gas-liquid, liquid-liquid two-phase slug flow. In the present study, a devised axial plane optical microscopy (APOM), which is an optical microscope system that makes it possible to directly take images in the depth direction parallel to the optical axis, was constructed and adjusted. The principle of APOM system was confirmed, and the images in the axial plane and in the lateral plane were acquired and evaluated with APOM system by changing the angle of mirror. The relationship between the acquired images with changing the mirror angle was also evaluated. It was confirmed that the change in acquired axial plane image proportional to the change in the angle of the mirror. The effect of flow rate, surface tension, viscosity of fluid on the slug length of dispersed phase and continuous phase was measured and evaluated to clarify the characteristics of two-phase flow in circular micro tubes. The slug length of dispersed phase decreases as the Weber number, Capillary number, and viscosity increases.
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Research Products
(4 results)
