Abstract
The effect of inertia on gravity-driven thin film free-surface flow over substrates containing topography is considered. Flow is modelled using a depth-averaged form of the governing Navier-Stokes equations and the discrete analogue of the coupled equation set solved accurately using an efficient full approximation storage (FAS) and full multigrid (FMG) technique. The free-surface disturbance induced by topographic features is illustrated by considering examples of gravity-driven flow over and around peak, trench and occlusion topography. Results are presented which demonstrate how increasing Reynolds number can significantly enhance the magnitude of free-surface disturbances, a feature which may have important consequences for the wide range of coating process that aim to maximise free-surface planarity. (C) 2010 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 537-542 |
Number of pages | 6 |
Journal | Chemical Engineering and Processing: Process Intensification |
Volume | 50 |
Issue number | 5-6 |
DOIs | |
Publication status | Published - 2011 |
Keywords
- Coating
- Thin film flows
- Microfluidics
- Topography
- INCLINED WAVY PLANES
- 2-DIMENSIONAL TOPOGRAPHY
- VISCOUS FILMS
- LIQUID-FILMS
- RESONANCE
- SURFACES