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.
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ASME 2009 Fluids Engineering Division Summer Meeting
August 2–6, 2009
Vail, Colorado, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4372-7
PROCEEDINGS PAPER
Numerical Simulation of Confined Swirling Flows of Oldroyd Fluids
Sahand Majidi,
Sahand Majidi
University of Tehran, Tehran, Iran
Search for other works by this author on:
Ashkan Javadzadegan
Ashkan Javadzadegan
University of Tehran, Tehran, Iran
Search for other works by this author on:
Sahand Majidi
University of Tehran, Tehran, Iran
Ashkan Javadzadegan
University of Tehran, Tehran, Iran
Paper No:
FEDSM2009-78340, pp. 2175-2182; 8 pages
Published Online:
July 26, 2010
Citation
Majidi, S, & Javadzadegan, A. "Numerical Simulation of Confined Swirling Flows of Oldroyd Fluids." Proceedings of the ASME 2009 Fluids Engineering Division Summer Meeting. Volume 1: Symposia, Parts A, B and C. Vail, Colorado, USA. August 2–6, 2009. pp. 2175-2182. ASME. https://doi.org/10.1115/FEDSM2009-78340
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