Mass transfer behavior on sinusoidal wavy walls at different Reynolds numbers
Mass transfer behavior on sinusoidal wavy walls at different Reynolds numbers
复制标题
不同雷诺数下正弦波壁上的传质行为
DOI:
10.1016/j.icheatmasstransfer.2019.104383
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发表时间:
2020
影响因子:
7
通讯作者:
Nagasaki Takuma
中科院分区:
文献类型:
--
作者:
Fujisawa Nobuyuki;Yamagata Takayuki;Nagasaki Takuma
The mass transfer behavior on sinusoidal wavy walls with respect to the smooth wall are studied both experimentally and numerically, and the influences of the height to wavelength ratio and Reynolds number are investigated. The mass transfer measurements are conducted by the plaster dissolution method on sinusoidal wavy walls of the height to wavelength ratios smaller than 0.1 at Reynolds numbers ranging from 3 × 104to 2 × 105. The experimental results indicate that the mass transfer increase rate grows with the increase of the height to wavelength ratio, while it decreases with the increase of the Reynolds number. The peak mass transfer increase was observed on the leeward of the trough irrespective of the height to wavelength ratio, while the peak position changes with the height to wavelength ratio and Reynolds number. These experimental results of mass transfer increase rate were well reproduced by the numerical simulations using the low-Reynolds numberk-εmodel. The results show the mechanisms of the mass transfer increase by sinusoidal wavy walls, and it decreases with increasing Reynolds numbers, which are caused by the reduction of the local recirculation region and turbulence over the wavy walls.
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