Publication de 4 numéros par an
ISSN Imprimer: 1099-2391
ISSN En ligne: 2641-7359
A TURBULENCE MODEL FOR COMPUTING THE FLOW OF POWER-LAW FLUIDS WITHIN CIRCULAR TUBES
RÉSUMÉ
The purpose of this work is to analyze the problem of the turbulence modeling of non-Newtonian fluids. First, the Kolmogorov characteristic parameters for the case of power-law fluids is obtained. The characteristic dissipation length is showed to be a function of the power-law index (n) and reduces to the Newtonian case when n = l. In addition, an algebraic turbulence model is proposed, in which an extension of the Van Driest damping function for power-law fluids is developed. A numerical solution to the hydrodynamically developed turbulent equation of motion flow in circular tubes is obtained. Comparisons with experimental data and with those from an empirical correlation for turbulent flow of non-Newtonian power-law fluids are made, showing good agreement.
-
Pinho F.T., Li C.F., Younis B.A., Sureshkumar R., A low Reynolds number turbulence closure for viscoelastic fluids, Journal of Non-Newtonian Fluid Mechanics, 154, 2-3, 2008. Crossref
-
Pinho F.T., A GNF framework for turbulent flow models of drag reducing fluids and proposal for a k–ε type closure, Journal of Non-Newtonian Fluid Mechanics, 114, 2-3, 2003. Crossref
-
Cruz D.O.A., Pinho F.T., Turbulent pipe flow predictions with a low Reynolds number k–ε model for drag reducing fluids, Journal of Non-Newtonian Fluid Mechanics, 114, 2-3, 2003. Crossref