Abstract
AbstractA numerical study was performed on laminar mixing of fluids by means of embedded microbarriers against the flow direction in two three‐dimensional T‐micromixers. Two microchannels with different obstacle arrangements were considered, and the effect of volumetric flow rate Q on two‐stream pull‐push motion was investigated. With increasing Q and distance of the barriers to the sidewalls K, different vortices and fluid movement patterns develop in the two micromixers. Maximum mass transfer is obtained for the micromixer with smaller K value. With decreasing K, pull‐push movement strongly affects fluid merging, and the quality of mixing increases. Moreover, the effect of fluid tortuosity was studied, and a direct relationship between hydrodynamic fluid tortuosity and mass transfer was found.
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