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- W2108085588 abstract "Publisher SummaryThis chapter presents numerical results obtained with a finite volume method for the creeping flow of viscoelastic fluids in both axisynmietric and planar 4:1 contractions. The increasing use of computational tools to design industrial equipment for polymer processing requires the ability of existing numerical methods to predict the flow of viscoelastic fluids. Two rheological equations are considered, named as the constant viscosity Oldroyd-B and the shear-thinning Phan-Thien/Tanner (PTT) models. Accurate solutions are presented over a wide range of the Deborah number (a measure of the elasticity of the flow). Vortex enhancement is observed for the axisymmetric contraction, with both rheological models, while for the planar contraction, vortex enhancement is only observed for the shear-thinning PTT model. In the latter geometry, vortex reduction and the appearance of a small lip vortex is predicted for the constant viscosity Oldroyd-B fluid. The results obtained for the constant-viscosity Oldroyd-B model are presented through a diagram in the chapter in terms of streamline plots, for increasing Deborah numbers." @default.
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- W2108085588 date "2003-01-01" @default.
- W2108085588 modified "2023-09-22" @default.
- W2108085588 title "Numerical simulation of viscoelastic contraction flows" @default.
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- W2108085588 doi "https://doi.org/10.1016/b978-008044046-0.50201-3" @default.
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