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dc.contributor.authorTelis-Romero, Javier [UNESP]
dc.contributor.authorGratao, Aha Carolina A [UNESP]
dc.contributor.authorGarcia-Cruz, Crispin H. [UNESP]
dc.contributor.authorTelis, Vania R N [UNESP]
dc.identifier.citationCiencia and Engenharia/ Science and Engineering Journal, v. 9, n. 1, p. 78-82, 2000.
dc.description.abstractFriction loss coefficients for laminar flow of xantan gum solutions (concentrations in the range of 0.1-0.5% by weight) through valves and fittings were experimentally determined. The rheological behavior, studied by means of a concentric cylinder rheometer, was pseudoplastic, being well described by the Ostwald-De Waele model with non-linear correlation coefficients (r) between 0.998 and 0.999. In the pressure drop measurements the following fittings were employed: completely open and half way open ball valve, completely open and half way open angle valve, tee used like coupling, tee used like a 90° elbow, short radius 90° elbow and coupling. The results showed that the friction loss coefficients increased with decreasing generalized Reynolds number. The friction loss coefficients could be well adjusted by a potential model, suggested by Kittredge & Rowley (1957) for Newtonian fluids, K f = A(Re g) -B, with correlation coefficients between 0.837 and 0.999.en
dc.relation.ispartofCiencia and Engenharia/ Science and Engineering Journal
dc.subjectCorrelation methods
dc.subjectNon Newtonian liquids
dc.subjectPipe fittings
dc.subjectPressure drop
dc.subjectPressure measurement
dc.subjectReynolds number
dc.subjectValves (mechanical)
dc.subjectConcentric cylinder rheometers
dc.subjectFriction loss coefficients
dc.subjectNonlinear correlation coefficients
dc.subjectOpen ball valves
dc.subjectXantan gum solutions
dc.subjectLaminar flow
dc.titleCoeficientes de perda de carga em valvulas e acessorios no escoamento laminar de fluidos nao-Newtonianospt
dc.title.alternativeFriction loss coefficients across valves and fittings for laminar flow of non-Newtonian fluidsen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationUNESP, Sao Jose do Rio Preto
dc.description.affiliationUnespUNESP, Sao Jose do Rio Preto
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt
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