Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/2145
metadata.dc.type: Artigo de Periódico
Issue Date: Jun-2007
metadata.dc.creator: ANDRADE, Luiz Claudio Fialho
PETRONÍLIO, Jamilson A.
MANESCHY, Carlos Edilson de Almeida
CRUZ, Daniel Onofre de Almeida
Title: The carreau-yasuda fluids: a skin friction equation for turbulent flow in pipes and kolmogorov dissipative scales
Citation: ANDRADE, Luiz Claudio F. et al. The carreau-yasuda fluids: a skin friction equation for turbulent flow in pipes and kolmogorov dissipative scales. Journal of the Brazilian Society of Mechanical Scinces & Engineering, Rio de Janeiro, v. 29, n. 2, p. 162-167, jun. 2007. Disponível em: <http://www.scielo.br/pdf/rbr/v49n2/02.pdf>. Acesso em: 06 dez. 2010. http://dx.doi.org/10.1590/S1678-58782007000200005.
Abstract: In this work the turbulent flow of the Non-Newtonian Carreau-Yasuda fluid will be studied. A skin friction equation for the turbulent flow of Carreau-Yasuda fluids will be derived assuming a logarithmic behavior of the turbulent mean velocity for the near wall flow out of the viscous sub layer. An alternative near wall characteristic length scale which takes into account the effects of the relaxation time will be introduced. The characteristic length will be obtained through the analysis of viscous region near the wall. The results compared with experimental data obtained with Tylose (methyl hydroxil cellulose) solutions showing good agreement. The relations between scales integral and dissipative obtained for length, time, velocity, kinetic energy, and vorticity will be derived for this type of fluid. When the power law index approach to unity the relations reduces to Newtonian case.
Keywords: Fluídos não-newtonianos
Mecânica dos fluídos
Turbulência
ISSN: 1678-5878
metadata.dc.rights: Acesso Aberto
Appears in Collections:Artigos Científicos - FEM/ITEC

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