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Science 2 October 1970:
Vol. 170. no. 3953, pp. 61 - 64
DOI: 10.1126/science.170.3953.61
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Articles

Surface Films Compacted by Moving Water: Demarcation Lines Reveal Film Edges

C. W. McCutchen 1

1 Section on Rheumatic Diseases, Laboratory of Experimental Pathology, National Institute of Arthritis and Metabolic Diseases, Bethesda, Maryland

When water flows under the edge of a surface film the large viscous shear stress at the edge prevents the film from spreading and raises a ridge on the water surface. Near the top of its downstream flank the ridge has an abrupt change in curvature that we see as a line on the water.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Sensuous-Intellectual Complementarity in Science.
T. R. Blackburn (1971)
Science 172, 1003-1007
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The Thoreau-Reynolds Ridge, a Lost and Found Phenomenon.
R. S. McDowell and C. W. McCutchen (1971)
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Science. ISSN 0036-8075 (print), 1095-9203 (online)