Abstract
The hydrodynamics of film drainage is normally treated using lubrication theory. Bird et al. suggested an alternative approach. Here, we compare these two approaches and find that lubrication theory neglects an edge effect. When the surfaces of the film are mobile, there is an additional normal force. Though typically negligible, in some cases this normal force may have an effect.
Original language | English |
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Pages (from-to) | 3185-3186 |
Number of pages | 2 |
Journal | Industrial and Engineering Chemistry Research |
Volume | 34 |
Issue number | 10 |
DOIs | |
State | Published - Oct 1 1995 |