Three-dimensional transient complex free surface flows: Numerical simulation of XPP fluid
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Data
2013-05-01
Autores
Figueiredo, R. A.
Oishi, C. M. [UNESP]
Cuminato, J. A.
Alves, M. A.
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Resumo
In this paper we present a finite difference MAC-type approach for solving three-dimensional viscoelastic incompressible free surface flows governed by the eXtended Pom-Pom (XPP) model, considering a wide range of parameters. The numerical formulation presented in this work is an extension to three-dimensions of our implicit technique [Journal of Non-Newtonian Fluid Mechanics 166 (2011) 165-179] for solving two-dimensional viscoelastic free surface flows. To enhance the stability of the numerical method, we employ a combination of the projection method with an implicit technique for treating the pressure on the free surfaces. The differential constitutive equation of the fluid is solved using a second-order Runge-Kutta scheme. The numerical technique is validated by performing a mesh refinement study on a pipe flow, and the numerical results presented include the simulation of two complex viscoelastic free surface flows: extrudate-swell problem and jet buckling phenomenon. © 2013 Elsevier B.V.
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Palavras-chave
Finite difference method, Free surface flows, Three dimensional, Viscoelastic flow, XPP model, Free-surface flow, Implicit techniques, Incompressible free surface flows, Non-Newtonian fluid mechanics, Numerical formulation, Numerical techniques, Viscoelastic flows, Crystallography, Fluid mechanics, Non Newtonian liquids, Numerical methods, Runge Kutta methods, Surfaces
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Journal of Non-Newtonian Fluid Mechanics, v. 195, p. 88-98.