Flow of a PTT fluid through planar contractions : vortex inhibition using rounded corners

M. Khodadadi Yazdi, S. A. Ramazani Ahmad, H. Hosseini Amoli, A. Behrang, A. Kamyabi

Research output: Chapter in Book / Conference PaperConference Paperpeer-review

Abstract

![CDATA[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.]]
Original languageEnglish
Title of host publicationProceedings of the ASME 2010 International Mechanical Engineering Congress & Exposition IMECE2010: November 12-18, 2010, Vancouver, British Columbia, Canada
PublisherASME
Pages601-607
Number of pages7
ISBN (Print)9780791844441
Publication statusPublished - 2010
EventInternational Mechanical Engineering Congress and Exposition -
Duration: 12 Nov 2010 → …

Conference

ConferenceInternational Mechanical Engineering Congress and Exposition
Period12/11/10 → …

Keywords

  • differential equations, linear
  • viscoelasticity

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