Friction losses in valves and fittings for viscoplastic fluids

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Data

2005-04-01

Autores

Telis-Romero, J.
Polizelli, M. A.
Gabas, A. L.
Telis, VRN

Título da Revista

ISSN da Revista

Título de Volume

Editor

Canadian Soc Chemical Engineering

Resumo

Data on pressure drop were obtained in stainless steel, sanitary fittings and valves during laminar and turbulent flow of aqueous suspensions of sucrose and bentonite. The rheological properties of these suspensions were determined and the Bingham model provided the best fitting with the experimental data. Friction losses were measured in fully- and partially-open butterfly and plug valves, bends and union. Values of loss coefficients (k(f)) were calculated and correlated as functions of the classical Reynolds number and the Reynolds number proposed by Govier and Aziz (1972) for viscoplastic fluids. The two-k method and a new proposed model presented the best adjustments for the Govier and Aziz Reynolds number, and Hedstrom and classical Reynolds numbers, respectively.

Descrição

Palavras-chave

pressure drop, non-Newtonian fluids, friction factors, loss coefficients

Como citar

Canadian Journal of Chemical Engineering. Ottawa: Canadian Soc Chemical Engineering, v. 83, n. 2, p. 186-193, 2005.