The flow of viscoelastic fluids past a cylinder: finite-volume high-resolution methods

• Tipo: Artigo em Revista Científica Internacional
• Data: 2001

Autores

Alves, MA (Autor) FEUP; Pinho, FT (Autor) FEUP; Oliveira, PJ (Autor) Outra

Revista

Título: Journal of Non-Newtonian Fluid Mechanics

Vol. 97 Nº 2

Páginas: 207-232

ISSN: 0377-0257

Editora: Elsevier

Indexação

ISI Web of Knowledge - 102 Citações

ISI Web of Science

Scopus - 130 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia mecânica > Engenharia automóvel

Outras Informações

ID Authenticus: P-000-WBX

DOI: 10.1016/s0377-0257(00)00198-1

Abstract (EN): Accurate solutions are obtained with the numerical method of Oliveira et al. [J. Non-Newtonian Fluid Mech. 79 (1998) 1] for the inertialess plane flow around a confined cylinder. This numerical procedure is based on the finite-volume method in non-orthogonal block-structured meshes with a collocated arrangement of the dependent variables, and makes use of a special interpolation practice to avoid stress-velocity decoupling. Two high-resolution schemes (MINMOD and SMART) are implemented to represent the convective terms in the constitutive equations for the upper convected Maxwell and Oldroyd-B fluids, and the resulting predictions of the drag coefficient on the cylinder are shown to be as accurate as existing finite-element method predictions based on the supposedly very accurate h-p refinement technique. Numerical uncertainties are quantified with help of Richardson' s extrapolation technique and the orders of convergence of the differencing schemes are established and shown to be second-order accurate. Calculations performed with a wake-refined mesh predicted the variation of the maximum longitudinal normal stress in the wake as De(3) and De(5) depending on Deborah number.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 26