Parametric study on the three-dimensional distribution of velocity of a FENE-CR fluid flow through a curved channel

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Joana M. Malheiro (Author) Other; Paulo J. Oliveira (Author) Other; Fernando T. Pinho (Author) FEUP

Journal

Title: Journal of Non-Newtonian Fluid Mechanics

Vol. 200

Pages: 88-102

ISSN: 0377-0257

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 10 Citations

INSPEC

Other information

Authenticus ID: P-006-750

DOI: 10.1016/j.jnnfm.2012.12.007

Abstract (EN): In order to better understand the three-dimensional non-Newtonian flow in an 180 degrees curved duct of square cross-section, simulations were carried out considering an incompressible viscoelastic fluid, which follows the non-linear FENE-CR model, having constant shear viscosity. A fully implicit finite-volume method was used for the solution of the governing equations. Numerical simulations were performed for different Reynolds and Weissenberg numbers, and by varying the model parameters, namely the retardation ratio (beta) and the extensibility (L-2). The aim was to analyse the development and distribution of velocity field in the cross-sections along the curved channel and as a consequence to understand the variation of maximum velocity with these parameters. The results reveal complex changes with increasing extensibility and decreasing retardation parameter, which are associated to transition from one to two pairs of vortices in the secondary flow. Comparison with the literature confirms and reveals that the absence of shear-thinning delays this transition.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15