Small-scale behavior of single gravity-driven fingers in an initially dry fracture

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Description

Experiments investigating the behavior of individual, gravity-driven fingers in an initially dry, rough-walled analog fracture are presented. Fingers were initiated from constant flow to a point source. Finger structure is described in detail; specific phenomena observed include: desaturation behind the finger-tip, variation in finger path, intermittent flow structures, finger-tip bifurcation, and formation of dendritic sub-fingers. Measurements were made of finger-tip velocity, finger width, and finger-tip length. Non-dimensional forms of the measured variables are analyzed relative to the independent parameters, flow rate and gravitational gradient.

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30 p.

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Nicholl, M.J.; Glass, R.J. & Nguyen, H.A. December 31, 1992.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Experiments investigating the behavior of individual, gravity-driven fingers in an initially dry, rough-walled analog fracture are presented. Fingers were initiated from constant flow to a point source. Finger structure is described in detail; specific phenomena observed include: desaturation behind the finger-tip, variation in finger path, intermittent flow structures, finger-tip bifurcation, and formation of dendritic sub-fingers. Measurements were made of finger-tip velocity, finger width, and finger-tip length. Non-dimensional forms of the measured variables are analyzed relative to the independent parameters, flow rate and gravitational gradient.

Physical Description

30 p.

Notes

INIS; OSTI as DE93006765

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  • 10. international high-level radioactive waste management conference, Las Vegas, NV (United States), 25-29 Apr 1993

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  • Other: DE93006765
  • Report No.: SAND--92-2790C
  • Report No.: CONF-930408--17
  • Grant Number: AC04-76DP00789
  • Office of Scientific & Technical Information Report Number: 138889
  • Archival Resource Key: ark:/67531/metadc627298

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • December 31, 1992

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 14, 2016, 6:59 p.m.

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Nicholl, M.J.; Glass, R.J. & Nguyen, H.A. Small-scale behavior of single gravity-driven fingers in an initially dry fracture, article, December 31, 1992; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc627298/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.