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- W3138575817 abstract "A rotating cylinder asymmetrically placed across a duct, with its axis perpendicular to the axis of the channel, has long established itself as a simple mechanism for the transport of Newtonian fluids in microfluidic channels. In the present study, the possibility of transporting viscoelastic fluids by this simple mechanism is numerically investigated using finite-volume method (FVM). For ease of analysis, we have relied on two-dimensional flow between two parallel plates for this purpose. To screen out the complicating effects of shear-dependent viscosity from the analysis, the viscoelastic fluid of interest is assumed to obey the Oldroyd-B model. Using finite-volume-method (RheoFoam solver) we have obtained converged creeping-flow results over a wide range of working parameters for Deborah numbers up to unity. Based on our obtained numerical results, it is concluded that a fluid's elasticity can negatively affect the performance of viscous micro-pumps. The drop in efficiency is predicted to increase the larger the Deborah number. At De = 1, the drop in efficiency is predicted to be around 30%, as compared with Newtonian fluids of the same viscosity. Since the drop in efficiency is not too excessive, viscous micropumps can be regarded as a viable option for the transport of moderately-elastic liquids, particularly in those microfluidic applications where efficiency is of secondary importance." @default.
- W3138575817 created "2021-03-29" @default.
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- W3138575817 date "2021-05-01" @default.
- W3138575817 modified "2023-10-16" @default.
- W3138575817 title "On the use of viscous micropumps for transporting viscoelastic fluids in channel flows: A numerical study" @default.
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- W3138575817 doi "https://doi.org/10.1016/j.jnnfm.2021.104528" @default.
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