Fluid mixing in hairpin-shaped channel and S-shaped channel with staggered herringbone grooves
碩士 === 國立成功大學 === 機械工程學系碩博士班 === 101 === The effects of combination of straight channels with staggered herringbone grooves and curved channels on the performance of micromixers are investigated by numerical simulations. The validity of numerical simulations is examined by comparing the numerical a...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2013
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| Online Access: | http://ndltd.ncl.edu.tw/handle/09298417166593434410 |
| Summary: | 碩士 === 國立成功大學 === 機械工程學系碩博士班 === 101 === The effects of combination of straight channels with staggered herringbone grooves and curved channels on the performance of micromixers are investigated by numerical simulations. The validity of numerical simulations is examined by comparing the numerical and experimental results. There are to mechanisms for mixing enhancement in the proposed micromixers. One is the stretch and fold of fluid interface induced by staggered herringbone grooves and the other is the vortices caused by centrifugal force in the curved channel. The results obtained for a wide range of Reynolds numbers show that the mixing efficiency of the micromixer with the staggered herringbone grooves on straight channel bottom arranged before the serpentine channel is better than that of the micromixers with the staggered herringbone grooves on straight channel bottom arranged between curved channel (i.e., hairpin-shaped channel) and the staggered herringbone grooves on straight channel bottom arranged after the serpentine channel. Besides, it is found that increasing the height of the serpentine channel reduces the pressure drop and increases mixing efficiency.
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