2008
DOI: 10.1016/j.cej.2008.03.003
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Energy losses of non-Newtonian fluids in sudden pipe contractions

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Cited by 48 publications
(33 citation statements)
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“…Here, the non-Newtonian behaviour of the fluid was accounted for by using the appropriate Reynolds number for the fluid. This was the conclusion drawn by Edwards et al(1985), Ma (1987), Pienaar (1998), Pal and Hwang (1999) and Fester et al (2008). Mika (2011) was, however, unable to establish dynamic similarity for laminar flow of ice slurries of various concentrations in sudden contractions.…”
Section: Contractions and Expansionsmentioning
confidence: 52%
See 1 more Smart Citation
“…Here, the non-Newtonian behaviour of the fluid was accounted for by using the appropriate Reynolds number for the fluid. This was the conclusion drawn by Edwards et al(1985), Ma (1987), Pienaar (1998), Pal and Hwang (1999) and Fester et al (2008). Mika (2011) was, however, unable to establish dynamic similarity for laminar flow of ice slurries of various concentrations in sudden contractions.…”
Section: Contractions and Expansionsmentioning
confidence: 52%
“…Edwards et al, 1985;Fester et al, 2008), all fittings show the k v values in laminar flow to be significantly greater than those in turbulent flow.…”
Section: Pump Power Predictionsmentioning
confidence: 99%
“…Javier et al [10] found the loss coefficients of different fittings were correlated as a function of Reynolds number by two-k method. Fester et al [11] studied the energy losses of Newtonian and non-Newtonian fluids in the different diameter ratio sudden contractions. Kazunori et al [12] found non-Newtonian fluids flowing through the sudden contractions show larger extensional viscosity with the concentration increases.…”
Section: Introductionmentioning
confidence: 99%
“…La magnitud de las pérdidas depende sustancialmente de resultados experimentales del coeficiente de pérdidas K y que en la literatura son muy discrepantes entre lo especificado por una investigación u otra (Bullen, Cheesema, Hussain & Ruffellt, 1987;Fester, Mbiya & Slatter, 2008). Las pérdidas de energía en los dispositivos de reducción del diámetro ocurren cuando el fluido circula por un conducto de diámetro constante y la sección transversal decrece de forma repentina o gradual.…”
Section: Introductionunclassified
“…Ellos tuvieron interés particular en el efecto de la relación del disolvente al parámetro de viscosidad total sobre el perfil del gradiente de presión y sobre las longitudes de desarrollo de entrada y salida; se presentan resultados para ciertos aspectos relacionados con la cinemática del flujo, con el fin de ilustrar la relación entre el campo de presión y el campo de flujo resultante. En Fester et al (2008) se investigó con fluidos no newtonianos las pérdidas de energía en contracciones súbitas, utilizando relaciones de diámetros de 0,22, 0,50 y 0,85, y números de Reynolds de 0,01 a 100.000, bajo la finalidad de corroborar y ampliar los datos existentes; se presentan un conjunto de resultados experimentales y un modelo numérico validado.…”
Section: Introductionunclassified