20.500.12556/RUL-186687 Validacija numeričnega modela mešanja kapljevin v pasivnem mikromešalniku Validation of a Numerical Model of Liquid Mixing in a Passive Micromixer V zaključni nalogi smo obravnavali numerično modeliranje mešanja kapljevin v pasivnem mikromešalniku z utori na dnu kanala v obliki ribje kosti (ang. Staggered herringbone micromixer – SHM). Obravnavali smo dve izvedbi SHM iz literature avtorjev Stroock s sodelavci in Williamsove s sodelavci. Pojav mešanja smo modelirali v programskem okolju COMSOL in analizirali vpliv gostote računske mreže na učinkovitost mešanja. Stopnjo mešanja smo ovrednotili s koeficientom variacije koncentracije (CoV) in ga primerjali z eksperimentalnimi rezultati iz literature. Ugotovili smo, da se z zgoščevanjem mreže rezultati približujejo poročanim eksperimentalnim vrednostim iz literature. Odstopanja od vrednosti iz literature smo pripisali idealiziranemu vhodnemu pogoju pri numeričnem modelu. Razviti numerični model predstavlja osnovo za nadaljnjo analizo mešanja v pasivnih mikromešalnikih. 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. mikromešalniki numerično modeliranje mešanje kapljevin računske mreže učinkovitost mešanja COMSOL Multiphysics micromixer numerical modelling liquid mixing computational mesh mixing efficiency COMSOL Multiphysics true false false [N. Prijatelj] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-04 08:31:13 2026-09-04 08:31:15 2026-09-09 14:01:58 0000-00-00 00:00:00 2026 0 Ljubljana 0 XII, 29 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.61:66.063(043.2) 289184 290529027 48974.pdf 48974.pdf 1 8BDB8622D94DB97F5F37F7E46E1B589D 2e7222512007318c6523ebe4135f9ec7b2998b9f17d7190cf158047185bd6022 39c6a34c-a82a-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246009 Fakulteta za strojništvo 0 0 0