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Pressure Loss of Gaseous Flow at Microtube Outlet

[+] Author Affiliations
Y. Horii, Y. Asako

Tokyo Metropolitan University, Tokyo, Japan

Paper No. FEDSM2008-55133, pp. 233-239; 7 pages
  • 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


The pressure loss of gaseous flow at a micro tube outlet was investigated numerically. The numerical methodology is based on the Arbitrary-Lagrangian-Eulerian (ALE) method. Axis-symmetric compressible momentum and energy equations are solved to obtain the pressure loss coefficient of gaseous flow at a micro tube outlet. Computed tube radiuses are 25, 50 and 75 μm. The stagnation pressure of upper stream of the tube is chosen in such a way that the Mach number at the tube outlet ranges from 0.1 to 1.3. The ambient (back) pressure is fixed at the atmospheric pressure. The pressure loss coefficients are compared with available experimental data for a conventional sized tube. The effects of the Ma number and the tube radius on the pressure loss coefficient are discussed and the correlation for the pressure loss coefficient is proposed.

Copyright © 2008 by ASME
Topics: Pressure , Gas flow



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