Viscoelastic fluid flow through gradual contractions: Experiments and simulations

• Type: Article in International Conference Proceedings Book
• Date: 2008

Authors

Keegan, FL (Author) Other; Escudier, MP (Author) Other; Alves, MA (Author) FEUP; Poole, RJ (Author) Other

Conference proceedings International

Title: XVTH INTERNATIONAL CONGRESS ON RHEOLOGY - THE SOCIETY OF RHEOLOGY 80TH ANNUAL MEETING, PTS 1 AND 2

Pages: 228-230

15th International Congress on Rheology/80th Annual Meeting of the Society-of-Rheology

Monterey, CA, AUG 03-08, 2008

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 1 Citation

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-007-N8A

DOI: 10.1063/1.2964644

Abstract (EN): This paper reports the results of an experimental investigation into the flow of aqueous solutions of a polyacrylamide at three concentrations through a curved gradual planar contraction with a contraction ratio of 8:1. Poole et al. (R.J. Poole et al (2005) Proc. R Soc. London A vol. 461) have previously observed large velocity overshoots near to the sidewalls of a gradual contraction while investigating the flow of a viscoelastic shear-thinning fluid through a sudden expansion preceded by a smooth gradual contraction. These overshoots were termed 'cat's ears, due to their appearance. Experimental results are presented here that confirm the occurrence of these overshoots within the contraction section without the presence of a sudden expansion at its outlet. Preliminary numerical results that exhibit qualitative agreement with the experimental results are also presented.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3