Premium
Water flow and slip on NAPL‐wetted surfaces of a parallel‐walled fracture
Author(s) -
Lee HangBok,
Yeo In Wook,
Lee KangKun
Publication year - 2007
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2007gl031333
Subject(s) - slip (aerodynamics) , wetting , laminar flow , materials science , slip ratio , geotechnical engineering , water flow , mechanics , geology , composite material , shear stress , thermodynamics , physics
The effects of various wetting conditions and aperture sizes on water flow and slip in a parallel‐walled fracture were investigated. Water flow experiments showed that a larger slip occurred as the surface became more hydrophobic. For a creosote‐wetted surface of the fracture with an aperture of 508 μ m, the increase in the water flow rate due to the slip was as much as 10.0% compared to that in a water‐wetted surface. Similarly to a water‐wetted surface, no slip took place at a gasoline‐wetted surface, which was weakly hydrophobic. The slip lengths, a notional distance from the wall to a point inside the wall where fluid velocity extrapolates to zero, for light oil‐ and creosote‐wetted surfaces were constant over a range of flow velocities in the laminar flow regime. The study indicates that no slip boundary condition‐based equations are not adequate for quantifying water flow through NAPL‐wetted fractures.