Numerical simulation of confined swirling flows of Oldroyd fluids

Sahand Majidi*, Ashkan Javadzadegan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

The effect of a fluid's elasticity has been investigated on the vortex breakdown phenomenon in confined swirling flow. Assuming that the fluid obeys upper-convected Maxwell model as its constitutive equation, the finite volume method together with a collocated mesh was used to calculate the velocity profiles and streamline pattern inside a typical lid-driven swirling flow at different Reynolds and Weissenberg numbers. The flow was to be steady and axisymmetric. Based on the results obtained in this work, it can be concluded that fluid's elasticity has a strong effect on the secondary flow completely reversing its direction of rotation depending on the Weissenberg number. Even in swirling flows with low ratio of elasticity to inertia, vortex breakdown is postponed to higher Reynolds numbers. Also, the effect of retardation ratio on the flow structure of viscoelastic fluid with the Weissenberg number being constant was surveyed. Based on our results, by decreasing the retardation ratio the flow becomes Newtonian like.

Original languageEnglish
Title of host publicationASME 2009
Subtitle of host publicationfluids engineering division summer meeting
Place of PublicationNew York
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages2175-2182
Number of pages8
Volume1
EditionParts A, B and C
ISBN (Electronic)9780791838556
ISBN (Print)9780791843727
DOIs
Publication statusPublished - 2009
Event2009 ASME Fluids Engineering Division Summer Conference, FEDSM2009 - Vail, CO, United States
Duration: 2 Aug 20096 Aug 2009

Other

Other2009 ASME Fluids Engineering Division Summer Conference, FEDSM2009
CountryUnited States
CityVail, CO
Period2/08/096/08/09

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