In this thesis, the numerical modeling of liquid mixing in a passive micromixer with staggered herringbone grooves on the bottom of the channel (Staggered Herringbone Micromixer – SHM) was investigated. Two SHM configurations from the literature were considered, developed by Stroock et al. and Williams et al. The mixing process was modeled using the COMSOL software environment, and the influence of computational mesh density on mixing efficiency was analyzed. The degree of mixing was evaluated using the coefficient of variation of concentration (CoV) and compared with experimental results reported in the literature. It was found that, with increasing mesh density, the numerical results approach the experimental values reported in the literature. The deviations from the literature values were attributed to the idealized inlet boundary condition used in the numerical model. The developed numerical model provides a basis for further analysis of mixing in passive micromixers.
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