Due to the incorrect use of the inlet tubing diameter, 1.9 mm, rather than the bead pack diameter, 10 mm, to determine the velocity of the wetting fluid v w , the capillary numbers Ca calculated were incorrect by a factor 27.70.The horizontal axes for Ca in figure 3(b) and figure 5 should be divided by a factor of 27.70, and hence range from 3.61e-6 to 7.22e-5. This does not impact any of the discussion or the conclusions drawn in the original publication. A corrected version of figure 5 is reproduced below.
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