Numerical investigation of three dimensional viscoelastic free surface flows: Impacting drop problem

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2014

Autores

Figueiredo, RA (Autor) Outra; Oishi, CM (Autor) Outra; Cuminato, JA (Autor) Outra; Azevedo, JC (Autor) Outra; Afonso, AM (Autor) FEUP; Alves, MA (Autor) Outra

Ata de Conferência Internacional

Título: 11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014

Páginas: 5368-5380

Joint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014

20 July 2014 through 25 July 2014

Indexação

Scopus - 5 Citações

Outras Informações

ID Authenticus: P-00G-19Z

Abstract (EN): This work presents a numerical investigation of three dimensional viscoelastic free surface flows. In particular, using two different numerical methodologies, we have simulated a typical free-surface benchmark flow problem: the impact of a viscoelastic fluid droplet with a rigid boundary. The numerical method was recently proposed by Figueiredo et al. [1] and has been implemented in a in-house viscoelastic flow solver. In this methodology, a finite difference scheme is adopted combining the Marker-And-Cell (MAC) method with a Front-Tracking strategy. In order to preserve mass conservation properties for transient viscoelastic fluid flows, we have modified the methodology in [1] to include an improvement on the MAC discretization of the velocity boundary conditions at free-surfaces. The code is verified by solving the drop impact problem for a Newtonian fluid. After this verification, we employ the Oldroyd-B model to assess the differences between the methodologies, and compare our results with the ones in the literature. Finally, a detailed study of the influence of the relevant rheological parameters of the non-linear viscoelastic models (Giesekus and XPP) is reported, regarding the deformation and spreading of the viscoelastic fluid drop after impacting on a rigid surface.

Idioma: Inglês

Tipo (Avaliação Docente): Científica