Author(s): A. Dittrich; Y. Wang; F. Nestmann
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Keywords: No Keywords
Abstract: Experiments were conducted in a flume with two layer steady, unidirectional flow of different density fluid over sills with flow separation at the lee side. Three criteria could be found in the literature for flow separation over topography based on the gradient of total, piezometric and buoyant excess pressure. Thus, the aim of this study was to obtain data for the verification of the three criteria and to determine the location of the point of separation, that is important for the description of the mixing processes in the lee of sills. The experiments showed that the piezometric pressure gradient represents a better criterion of flow separation than the other two pressure gradients. The location of the point of separation can be determined with the mean parameter H2 of the approach flow and the geometry of the sills.
Year: 1997