Resistance Coefficients for Non-Newtonian Flows in Pipe Fittings

Veruscha Fester, Paul Slatter and Neil Alderman Cape Peninsula University of Technology, Royal Melbourne Institute of Technology, [Pg.151]

Hooper (1981) presented a two-K method for determining the loss coefficient for laminar and turbulent flow through various fittings and valves. This method consists of two factors, one for laminar flow, Ki and the other for turbulent flow, Keurb- Unlike that for IQiirb, there is little data available for Ki. Experimental data over the full range of laminar and turbulent flow are presented for flow of Newtonian and non-Newtonian fluids in various fittings. The experimental procedures for the accurate determination of loss coefficients are described. [Pg.151]

Current practice for laminar flow through various fittings is to present the loss coefficient as a function of an appropriate Reynolds number. Different Reynolds numbers developed for non-Newtonian fluids have been evaluated to determine their ability to establish the necessary requirement of dynamic similarity for flow of viscoplastic fluids in various fittings. [Pg.151]

The laminar to turbulent transition in pipe fittings are also discussed. The experimental work done to date on contractions, expansions, valves and orifices is reviewed in addition to similar work published in literature. [Pg.151]

The magnitude of errors that can be obtained using the incorrect loss coefficient is demonstrated by means of a worked example. This chapter will provide the pipeline design [Pg.151]

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