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- W1983251392 abstract "Abstract This study arose as an annexe to an ongoing investigation of the breakdown behaviour of liquid films traversing the stator blades of operating wet steam turbines. The plane surface of a horizonatal glass block is treated so that some areas are wetted by water and others are water-repelant. A circular area (wettable, ‘drop’) was surrounded by an annulus (non-wetting) in turn surrounded by a second narrow annulus (wettable, ‘ring’), all circles being concentric. A liquid film is formed over the whole area within the outer circle. This is diminished in thickness until perforation occurs and the residual water collects on and covers each of the wettable areas. Measurements of height and of liquid mass are made both for the original film and later for the drop and the ring. These measurements permit the calculation both of the original free energy and aggregate final free energies. An energy loss occurs which can be related to the mass of the film and the geometry of the prepared surfaces and can be calculated by suitably modelling the profiles of the ring and drop by geometric shapes which permit analysis. A circular segment gave the best fit. Contact angles calculated from the modelled profiles were checked by measurements on photographic silhouettes. Two new dimensionless numbers were introduced into the analysis: He=pgH c 1 /2δ LG which is the ratio of the potential energy to the surface energy for a liquid component and Ae=pgAc/δ LG which is related to the ratio of the diameter of the solid surface wetted by the original film to the film thickness." @default.
- W1983251392 created "2016-06-24" @default.
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- W1983251392 date "1983-02-01" @default.
- W1983251392 modified "2023-09-26" @default.
- W1983251392 title "Free energy loss during the breakdown of liquid films" @default.
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- W1983251392 doi "https://doi.org/10.1016/s0017-9310(83)80025-8" @default.
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