Contraction flow is one of important geometries in fluid flow both in Newtonian and non-Newtonian fluids. In this study, flow of a viscoelastic fluid through a planar 4:1 contraction with rounded corners was investigated. Six different rounding ratios (RR = 0, 0.125, 0.25, 0.375, 0.438, 0.475, 0.488) was examined using the linear PTT constitutive equation at creeping flow and isothermal condition. Then the resulting PDE set including continuity, momentum, and PTT constitutive equations were implemented to the OpenFOAM software. The results clearly show vortex deterioration with increasing rounding diameter, so that when rounding corner exceeds a critical value, the vortex disappears completely. This phenomenon was also observed at different upstream widths. Furthermore, by increasing rounding diameter, the diminishing vortex approaches to the re-entrant corner.
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ASME 2010 International Mechanical Engineering Congress and Exposition
November 12–18, 2010
Vancouver, British Columbia, Canada
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4444-1
PROCEEDINGS PAPER
Flow of a PTT Fluid Through Planar Contractions: Vortex Inhibition Using Rounded Corners Available to Purchase
M. Khodadadi Yazdi,
M. Khodadadi Yazdi
Sharif University of Technology, Tehran, Tehran, Iran
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A. Ramazani S. A.,
A. Ramazani S. A.
Sharif University of Technology, Tehran, Tehran, Iran
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H. Hosseini Amoli,
H. Hosseini Amoli
Sharif University of Technology, Tehran, Tehran, Iran
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A. Behrang,
A. Behrang
Sharif University of Technology, Tehran, Tehran, Iran
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A. Kamyabi
A. Kamyabi
Sharif University of Technology, Tehran, Tehran, Iran
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M. Khodadadi Yazdi
Sharif University of Technology, Tehran, Tehran, Iran
A. Ramazani S. A.
Sharif University of Technology, Tehran, Tehran, Iran
H. Hosseini Amoli
Sharif University of Technology, Tehran, Tehran, Iran
A. Behrang
Sharif University of Technology, Tehran, Tehran, Iran
A. Kamyabi
Sharif University of Technology, Tehran, Tehran, Iran
Paper No:
IMECE2010-40267, pp. 601-607; 7 pages
Published Online:
April 30, 2012
Citation
Khodadadi Yazdi, M, Ramazani S. A., A, Hosseini Amoli, H, Behrang, A, & Kamyabi, A. "Flow of a PTT Fluid Through Planar Contractions: Vortex Inhibition Using Rounded Corners." Proceedings of the ASME 2010 International Mechanical Engineering Congress and Exposition. Volume 7: Fluid Flow, Heat Transfer and Thermal Systems, Parts A and B. Vancouver, British Columbia, Canada. November 12–18, 2010. pp. 601-607. ASME. https://doi.org/10.1115/IMECE2010-40267
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