Numerical simulation of drop impact and jet buckling problems using the eXtended Pom–Pom model

• Published in: Journal of non-Newtonian fluid mechanics Vol. 169; pp. 91 - 103
• Main Authors: Oishi, C.M., Martins, F.P., Tomé, M.F., Alves, M.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-02-2012
• Subjects: Benchmarking; Buckling; Computational fluid dynamics; Computer simulation; Drop impact; Finite difference method; Fluid flow; Fluids; Free surface flows; Implicit techniques; Jet buckling; Mathematical models; Numerical prediction; Viscoelastic fluids; Viscoelastic fluids; Drop impact; Jet buckling; Free surface flows; Implicit techniques; Finite difference method
• ISSN: 0377-0257; 1873-2631
• DOI: 10.1016/j.jnnfm.2011.12.001

► A finite-difference method is used to simulate time-dependent, 2D moving free surface flows. ► Newtonian, Oldroyd-B and eXtended Pom–Pom models are used. ► The fall and impact on a wall of a viscoelastic drop is investigated. ► The jet buckling of viscoelastic fluids is analyzed. ► The influence of rheological and hydrodynamic parameters is discussed.
This work presents numerical simulations of two fluid flow problems involving moving free surfaces: the impacting drop and fluid jet buckling. The viscoelastic model used in these simulations is the eXtended Pom–Pom (XPP) model. To validate the code, numerical predictions of the drop impact problem for Newtonian and Oldroyd-B fluids are presented and compared with other methods. In particular, a benchmark on numerical simulations for a XPP drop impacting on a rigid plate is performed for a wide range of the relevant parameters. Finally, to provide an additional application of free surface flows of XPP fluids, the viscous jet buckling problem is simulated and discussed.