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Related Experiment Video

Updated: Jul 10, 2026

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

Purely elastic flow asymmetries.

R J Poole¹, M A Alves, P J Oliveira

¹Department of Engineering, University of Liverpool, Brownlow Street, Liverpool, L69 3GH United Kingdom.

Physical Review Letters

|November 13, 2007

Summary

This summary is machine-generated.

The flow of viscoelastic fluids in a symmetric cross-slot can become asymmetric due to elastic forces. Inertia helps stabilize this flow, matching experimental observations.

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Last Updated: Jul 10, 2026

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Published on: July 19, 2016

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Area of Science:

Fluid dynamics
Rheology
Non-Newtonian fluid mechanics

Background:

Viscoelastic fluids exhibit both viscous and elastic properties.
The upper-convected Maxwell model is a fundamental model for differential viscoelastic fluids.
Flow in symmetric geometries can unexpectedly lead to asymmetric states.

Purpose of the Study:

To investigate the flow behavior of the upper-convected Maxwell model in a cross-slot geometry.
To determine the nature of the asymmetry observed in the flow.
To understand the role of elasticity and inertia in this phenomenon.

Main Methods:

Numerical simulation of fluid flow.
Analysis of the upper-convected Maxwell model.
Investigation of bifurcations to steady states.

Main Results:

The flow of the upper-convected Maxwell model exhibits a bifurcation to a steady asymmetric state.
The observed asymmetry is primarily driven by elastic effects.
Inertia acts as a stabilizing factor, counteracting the asymmetry.

Conclusions:

Elasticity is the dominant factor causing flow asymmetry in this viscoelastic model.
Inertia plays a stabilizing role in viscoelastic flows within symmetric geometries.
Numerical findings align with recent experimental visualizations in microfluidics.