20.500.12556/RUL-128033 Študij fokusiranja delcev v mikrofluidnih sistemih z uporabo mrežne Boltzmannove metode Particle focusing in microfluidic systems: A lattice-Boltzmann study V diplomskem delu je predstavljena obravnava fokusiranja delcev v ravnem mikrofluidnem kanalu. Izvedena je teoretična študija na osnovi mrežne Boltzmannove metode, sklopljene z robnimi pogoji s potopljenimi mejami. V začetku je izvedena validacija numerične metode na primeru fokusiranja enega samega delca in urejanja delcev v homogeni suspenziji. V nadaljevanju so obravnavane heterogene suspenzije z delci dveh različnih velikosti, ki do sedaj teoretično še niso bile obravnavane. Preverjen je vpliv Reynoldsovega števila in razmerja polmerov delcev na tvorbo urejenih struktur. Dodatno je predstavljen vpliv Reynoldsovega števila in velikosti delcev na čas fokusiranja. Demonstrirano je, da obstaja določeno kritično razmerje polmerov delcev, ki prepreči tvorbo stabilnih struktur. Dodatno je ugotovljeno, da na obliko urejenih struktur Reynoldsovo število nima bistvenega vpliva, ima pa vpliv na čas fokusiranja. In the following thesis we are concerned with particle focusing based on the inertial lift effect in straight microfluidic channels. Extensive numerical simulations based on the lattice Boltzmann method coupled to immersed boundary conditions were performed. We start by first validating the numerical method on simple cases of a single particle focusing and with particle ordering in a homogenous suspension. We continue by applying the validated numerical framework to heterogenous bidisperse suspensions. The influence of the Reynolds number and particle diameter ratio on particle train formation is investigated. The effect of particle size and Reynolds number on focusing time is also discussed. We demonstrate that there exists a critical ratio of radii where a stable particle train cannot be formed. Reynolds number was not found to have a significant effect on the final particle configuration, but did influence the focusing times. mikrofluidika mrežna Boltzmannova metoda fokusiranje delcev microfluidics lattice Boltzmann method particle focusing true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2021-07-01 13:05:00 2021-07-01 13:05:03 2022-09-07 04:12:51 0000-00-00 00:00:00 2021 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 13561 70785283 Hubman_Anze_-_Studij_fokusiranja_delcev_v_mikrofluidnih_sistemih_z_uporabo_mrezne_Boltzmannove_m.pdf Hubman_Anze_-_Studij_fokusiranja_delcev_v_mikrofluidnih_sistemih_z_uporabo_mrezne_Boltzmannove_m.pdf 1 75DE6D1663FE28456B7ACB624E86FBE3 8ea6c12aa717df3768972c1e958c2d570f92ef4238a7dbde3c7bf57175883411 0f3f56f0-da5c-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144659 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0