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SPH Simulations of Airflow Through a Narrow Constriction

[+] Author Affiliations
Jaime Klapp, Eduardo de la Cruz Sanchez

Instituto Nacional de Investigaciones Nucleares, Ocoyoacac, MEX, México

Leonardo Di G. Sigalotti

Instituto Venezolano de Investigaciones Cientificas, Caracas, Venezuela

Paper No. IMECE2008-67673, pp. 631-640; 10 pages
doi:10.1115/IMECE2008-67673
From:
  • ASME 2008 International Mechanical Engineering Congress and Exposition
  • Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C
  • Boston, Massachusetts, USA, October 31–November 6, 2008
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4871-5 | eISBN: 978-0-7918-3840-2
  • Copyright © 2008 by ASME

abstract

We simulate the flow of air through a channel with a narrow bridge passage (or throat) at high Reynolds numbers, using the method of Smoothed Particle Hydrodynamics (SPH). The depth of the channel is assumed to be infinite so that the flow is planar. A fully-developed laminar flow with a time increasing velocity is used at the inlet of the channel. The calculation is followed past the point where the airflow velocity becomes sonic (or choked) at the outlet of the throat. We have presented a theoretical model that predicts the well known experimental result that when the flow becomes critical, the pressure drop across the channel reaches a limiting value of ∼ 0.52–0.53. Our numerical calculation reproduced this result with very high accuracy.

Copyright © 2008 by ASME

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