Yoon, Kyu Jung, Hyun Wook Chun, Myung-Suk 2024-01-19T18:04:34Z 2024-01-19T18:04:34Z 2021-09-05 2020-02 1226-119X https://pubs.kist.re.kr/handle/201004/119019 To effectively control the mixing of target materials inside microfluidic devices, the Dean flow features of generalized-Newtonian Bird-Carreau (BC) fluids in curved rectangular channels are theoretically investigated, as a passive technique. Governing equations coupled with the Cauchy momentum equation and the BC model are solved using the finite volume scheme with a semi-implicit method for pressure-linked equations-revised (SIMPLER) algorithm. The effects of the rheological parameters of BC model, such as viscosity ratio, power-law index, and relaxation time constant, on the Dean flow are systematically examined in a wide range of Dean numbers (Dn), (very low to O(10(2))). The entire flow characteristics of BC fluids in curved microchannels with increasing Dn are quantified using flow skewness, Dn(Ref)/Dn(MES), and magnitude of vorticity, resulting in two main findings of a more outward-skewed streamwise velocity profile and a more enhanced secondary Dean vortex for non-Newtonian fluids in comparison to the Newtonian case at the same Dn. English KOREAN SOC RHEOLOGY NON-NEWTONIAN FLUIDS LAMINAR-FLOW SEPARATION PARTICLES Secondary Dean flow characteristics of inelastic Bird-Carreau fluids in curved microchannels Article 10.1007/s13367-020-0007-4 1 KOREA-AUSTRALIA RHEOLOGY JOURNAL, v.32, no.1, pp.61 - 70 KOREA-AUSTRALIA RHEOLOGY JOURNAL 32 1 61 70 scie scopus kci ART002558106 000519376700006 2-s2.0-85079815580 Mechanics Polymer Science Mechanics Polymer Science Article NON-NEWTONIAN FLUIDS LAMINAR-FLOW SEPARATION PARTICLES secondary Dean flow flow skewness Bird-Carreau model curved microchannel microfluidics