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Flow in Rectangular Cavities With Two Vertical Oscillating Walls

[+] Author Affiliations
Guillermo E. Ovando

Instituto Tecnológico de Veracruz, Veracruz, Veracruz, Mexico

Alberto Beltran

Universidad Nacional Autónoma de Mexico, Temixco, Morelos, Mexico

Sandy L. Ovando

Universidad Juarez Autónoma de Tabasco, Villahermosa, Tabasco, Mexico

Paper No. FEDSM2008-55205, pp. 389-396; 8 pages
doi:10.1115/FEDSM2008-55205
From:
  • ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
  • Volume 1: Symposia, Parts A and B
  • Jacksonville, Florida, USA, August 10–14, 2008
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4840-1 | eISBN: 0-7918-3832-3
  • Copyright © 2008 by ASME

abstract

Fluid dynamics in a two-dimensional rectangular cavity with vertical oscillatory walls out of phase was studied numerically. The Navier-Stokes equations were solved using the finite element method. We analyzed the behaviour of the velocity fields, the vorticity fields and we also obtained the streaklines of the fluid at the bottom left corner of the domain for one and two cycles, which is associated with the mixing of the fluid. The analysis was carried out for three different Reynolds numbers of 50, 500 and 1000 with constant displacement amplitude of the moving boundaries of 0.2. For this range of parameters the flow is characterized by two kind of symmetries. We found that for lower Reynolds number there is a good local mixing given by cell structures and the smooth behavior of the fluid inside the cavity; however for higher Reynolds number these structures disappear due to the fluid near the vertical walls impinges against the corner of the cavity, then this fluid is dispersed through the whole cavity during the cycle, increasing the global mixing of the fluid.

Copyright © 2008 by ASME

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