| Project/Area Number |
63550712
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
化学工学
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| Research Institution | Kyushu University |
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Principal Investigator |
KOMORI Satoru Kyushu Uni., Dept. of Chem. Eng., Associ. Prof., 工学部, 助教授 (60127082)
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| Co-Investigator(Kenkyū-buntansha) |
MURAKAMI Yasuhiro Kyushu Univ., Dept. of Chem. Eng., Prof., 工学部, 教授 (00037730)
UEDA Hiromasa National Insti. for Environ. Studies, Section Head, 大気環境部, 室長 (70026186)
TENDA Tugio Kyushu Uni., Dept. of Chem. Eng., Research Associ., 工学部, 助手 (10180093)
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1989: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1988: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Turbulence Structure / Gas-Absorption / Gas-Liquid Interface / Surface-Renewal Eddy / Mass Transfer / 乱流 |
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| Research Abstract |
Mass transfer into a turbulent liquid across the gas-liquid interface in the absence of external interfacial shear was experimentally investigated in both open-channel water-flows with and without grid-generated turbulence. The frequency of the appearance of surface-renewal eddies and the scales of surface-renewal eddies were measured by conditionally processing the concentration signal of the tracer emitted from a point source; the mass-transfer coefficient on the liquid side was estimated through carbon-dioxide absorption experiments. The mass-transfer coefficient was significantly correlated with the frequency of the appearance of large-scale renewal eddies in both open-channel flows with and without turbulence grids. The results show that the large-scale eddies control the mass transfer across the gas-liquid interface into turbulent liquid flows in the absence of an external interfacial shear. Based on the results, mass transfer mechanism was modelled by using the surface-renewal concept.
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