Please use this identifier to cite or link to this item:
https://hdl.handle.net/10216/98420
Author(s): | M. A. Alves D. Torres M. P. Gonçalves P. J. Oliveira F. T. Pinho |
Title: | Visualization studies of viscoelastic flow in a 4:1 square/square contraction |
Issue Date: | 2003 |
Abstract: | Visualizations of the 3-D flow in a 4:1 sudden square-square contraction for a viscoelastic shear-thinning fluid underconditions of negligible inertia show provocative flow patterns. Whereas for a Newtonian fluid the vortex length remainsunchanged, with the non-Newtonian fluid there is a dramatic increase in vortex length with fluid elasticity leading to unstableperiodic flow at higher flow rates. In the steady flow regime the vortices are not closed and fluid particles enter the middle-planevortex, rotate towards its eye, drift to the corner plane vortex, rotate to its periphery and exit to the downstream duct, a dynamicprocess that is opposite that found with Newtonian fluids. The periodic flow was characterised by a constant Strouhal number of 0.5. |
Subject: | Ciências da engenharia e tecnologias Engineering and technology |
Scientific areas: | Ciências da engenharia e tecnologias Engineering and technology |
URI: | https://repositorio-aberto.up.pt/handle/10216/98420 |
Source: | Proceedings of COBEM 2003 |
Document Type: | Artigo em Livro de Atas de Conferência Internacional |
Rights: | restrictedAccess |
Appears in Collections: | FEUP - Artigo em Livro de Atas de Conferência Internacional |
Files in This Item:
File | Description | Size | Format | |
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68212.pdf Restricted Access | 1.21 MB | Adobe PDF | Request a copy from the Author(s) |
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