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A Criterion for Predicting Shear-driven Film Separation at an Expanding Corner with Experimental Validation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wegener, Jeffrey L. Friedrich, Mark A. Drallmeier, James A. Armaly, Bassem F. |
| Copyright Year | 2008 |
| Abstract | The dynamics of thin liquid films that develop on a solid surface and are driven by an adjacent gas flow have many engineering applications including fuel systems in internal combustion engines, liquid atomizer systems, flows in evaporators and condensers, and re-entrainment in demisting applications. However, details of the interaction between inertial, surface tension, and gravitational forces that affect the behavior of these shear-driven thin liquid films at a sharp, expanding corner are not clear. Of particular interest is the determination of conditions which cause a partial or complete separation of the film from the surface at the corner. A criterion is proposed to predict the onset of shear-driven film separation from the surface at an expanding corner. The criterion is validated with experimental measurements of the fraction of liquid film mass separated, as well as with comparisons to other observations found in the literature. The results show that the proposed force ratio correlates well to the onset of film separation over a wide range of experimental test conditions, including a variation of the surface tension of the liquid. The correlation suggests the gas phase impacts the separation process only through its effect on the liquid film momentum. * Corresponding author: jlwqm2@mst.edu |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ilass.org/2/conferencepapers/Paper%20M4-B-4.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
