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Experimental Study of Water and Air Based Permeabilities of Washed and Screened Sands

[+] Author Affiliations
Shu-Ye Lei

Tsinghua University

Paper No. IMECE2005-79667, pp. 283-288; 6 pages
doi:10.1115/IMECE2005-79667
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Part A
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4221-5 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

The permeability of narrow screened washed sands of granularity 100–450 μm was measured experimentally using water and air to investigate the effect of slip on the gas based permeability. The experimental data show that the air based permeability of the unconsolidated particle media is not proportional to the square of the mean particle diameter and that slip significantly affects the air based permeability measurements for unconsolidated porous media. The velocity slip effect is significant even for Kn<10−3 . Slip effects were not found in the water based permeability measurements with the same sand samples. All of the experimental data lay around the curve k/d = 0.283φ2.67 within ± 4.1%. However, the water based permeability was not below all of the air based permeability as expected. The air based permeability eliminated slip effects was about 59 % lower than that water based one, much larger than possible measurement. The experimental results showed that the standard air viscosity value in the handbooks was not its actual, the actual air viscosity may be over twice of that in handbooks.

Copyright © 2005 by ASME
Topics: Permeability , Sands , Water

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