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Incompresible Periodically Reversing Flow in a Conical Pipeline of Finite Length

[+] Author Affiliations
J. Luis Luviano-Ortiz, Abel Hernandez-Guerrero, Jose-Manuel Luna

Universidad de Guanajuato, Salamanca, GTO, México

Eduardo Ramos

Universidad Nacional Autónoma de México, Cuernavaca, MOR, México

Paper No. IMECE2009-11208, pp. 277-287; 11 pages
doi:10.1115/IMECE2009-11208
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4382-6 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

A numerical three-dimensional study has been carried out to analyze the hydrodynamic behavior of an incompressible periodically-reversing flow in a conical pipeline of finite length. In order to generate the oscillatory flow, a two pistons-driven pipe flow was established (the pistons were placed at the ends of the pipeline.) In the smaller piston the Womersley number was set to 16 while the axial displacement/diameter ratio was set to 1. The hydrodynamic flow behavior is considered and discussed for the accelerating and decelerating phases of the cycle. The numerical results show the generation of vortices for different penetration lengths. One of the most representative results is that in the position of 183.25°, after the pistons reach their maximum displacement, the flow pattern loses the axial symmetry that had appeared for previous phases of the cycle.

Copyright © 2009 by ASME

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