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TitleDevelopment length in planar channel flows of inelastic non-Newtonian fluids
Author(s)Fernandes, Célio Bruno Pinto
Ferrás, Luís Jorge Lima
Araujo, M. S.
Nóbrega, J. M.
KeywordsDevelopment length
Sisko model
Issue date2018
PublisherElsevier Science BV
JournalJournal of Non-Newtonian Fluid Mechanics
Abstract(s)This work presents a numerical study on the development length (L = L/H) required to reach fully-developed flow conditions at the entrance of a planar channel for inelastic non-Newtonian fluids modeled by the Sisko model. The simulations were carried out for low Reynolds number flows in the range 0 < Re <= 100, for a power law index, n, in the range 1/3 <= n <= 1 and for a dimensionless infinite viscosity, <(mu)over bar>(infinity), varying in the range 0 <= (mu) over bar (infinity) <= 0.1. A new non-linear relationship between L and Re was derived, taking into account the different values of n and (mu) over bar (infinity) Moreover, new exact solutions are presented for the velocity profile under fully developed flow conditions (for specific values of n).
AccessRestricted access (UMinho)
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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