Investigation of Flow Upstream of Orifices |
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Authors: | D B Bryant A A Khan N M Aziz |
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Affiliation: | 1Graduate Student, Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29630-0911. 2Assistant Professor, Dept. of Civil Engineering, Clemson Univ., 218 Lowry Hall, Clemson, SC 29630-0911. 3Professor and Chairman, Dept. of Civil Engineering, Clemson Univ., 110 Lowry Hall, Clemson, SC 29630-0911.
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Abstract: | A physical model study is conducted to investigate the flow field upstream of orifices. In particular, new experimental data for the upstream flow pattern resulting from multiple orifices, an orifice near a free surface, and a large orifice (where the pressure gradient across the orifice cannot be ignored) are collected and presented. A new potential flow solution for flow behind orifices is developed to include pressure gradient effects as well as to accurately superpose the solution due to multiple orifices and determine a solution close to orifices. The proposed solution compares well with the measured data for multiple orifices and for an orifice near a free surface. For a large orifice, the skew in the velocity profile in the vertical direction due to the pressure gradient is accurately predicted. |
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Keywords: | Streamflow Potential flow Ducts Culverts Ponds Sediment |
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