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- W4376122850 abstract "Due to their nature, the use of shear thickening fluids (STFs) in engineering applications has sparked the interest for the development of energy dissipating systems, such as damping devices or shock absorbers. The Rheinforce technology allows to design customized energy dissipative composites by embedding microfluidic channels filled with STFs in a scaffold material. One of the reasons for using microfluidic channels is that their shape can be numerically optimized to control pressure drop (also known as rectifiers); thus, by controlling the pressure drop, it is possible the control the energy dissipated by the viscous effect. Upon impact, the fluid is forced to flow through the microchannel and experiences the typical entry flow until it reaches the fully developed flow. It is well-known for Newtonian fluid that the entrance flow is responsible for an important percentage of the pressure drop in the fluid. This analysis has been numerically performed before for shear thickening fluids modelled by a Power-Law model. However, as this constitutive model represents a continuously growing viscosity between end-viscosity plateau values, it is not representative of the characteristic viscosity curve of shear thickening fluids, which typically exhibit a three-regions shape (thinning-thickening-thinning). This work analyzes for the very first time the influence of these three regions on the entry flow on a pipe. 2D numerical simulations have been performed for four STFs consisting of four dispersions of fumed silica nanoparticles in polypropylene glycol varying concentration (7.5-20wt%) modelled by Khandavalli, et al.[1]. The simulations were carried out for low generalized Reynolds numbers, corresponding to the shear thickening region of the shear viscosity curve for each formulation." @default.
- W4376122850 created "2023-05-12" @default.
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- W4376122850 date "2023-05-09" @default.
- W4376122850 modified "2023-10-01" @default.
- W4376122850 title "Numerical analysis of the development length of shear thickening fluids in a 2D axisymmetric microfluidic channel" @default.
- W4376122850 doi "https://doi.org/10.48550/arxiv.2305.05306" @default.
- W4376122850 hasPublicationYear "2023" @default.
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