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Experimental study on oscillating feedback micromixer for miscible liquids using the Coanda Effect
Author(s) -
Xu Cong,
Chu Yifeng
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14702
Subject(s) - micromixer , mixing (physics) , splitter plate , splitter , micromixing , reynolds number , mechanics , vortex , channel (broadcasting) , oscillation (cell signaling) , feedback control , control theory (sociology) , microfluidics , materials science , physics , chemistry , thermodynamics , optics , engineering , computer science , control engineering , electrical engineering , turbulence , biochemistry , control (management) , quantum mechanics , artificial intelligence
An oscillating feedback micromixer with no moving parts comprises an inlet channel, a diverging mixing chamber, a splitter, two feedback channels, and an outlet channel. Using the Coanda effect, two liquids are passively mixed in an oscillating feedback micromixer. Three oscillating feedback micromixers were experimentally investigated using two miscible liquids. The first had asymmetric feedback channels and a splitter, the second had symmetric feedback channels and a splitter, and the third had symmetric feedback channels and no splitter. Three chaotic mixing modes—vortex mixing, internal recirculation mixing, and oscillating mixing—were observed with increasing Reynolds numbers. The asymmetric oscillating feedback micromixer was determined to have the best mixing performance among the three micromixers. The splitter and asymmetric feedback channels can facilitate internal recirculation through feedback channels and fluidic oscillation, thereby enhancing the mixing efficiency. A completed mixing was achieved in the asymmetric micromixer. © 2014 American Institute of Chemical Engineers AIChE J , 61: 1054–1063, 2015