Implementation and Evaluation of a Parameterized Discharge Coefficient into DG-SWEM
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Date
2023-12
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The Ohio State University
Abstract
The subject of this thesis is the incorporation of a simple method for computing the discharge coefficient in weir overflow predictions into an existing shallow water code. This was achieved by implementing a parameterized definition of the discharge coefficient into the standard weir discharge formula. The steady-state upstream water height and water height above the weir produced from computational models at specified flow rates were then compared to experimental values observed in order to assess their accuracy. In the interest of improving existing computational models, the current method of determining the discharge coefficient was then compared to the updated method for determining the discharge coefficient. When compared to the laboratory experiment, the updated discharge coefficient showed a 4.12% and 15.3% reduction of error for the upstream water height and water height above the weir, respectively. Additional efforts could be made to investigate if the improvements are consistent with different lengths and heights of weir structures, although such examinations would be limited by the availability of data from physical experiments.
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Keywords
CFD, DG-SWEM, Discharge Coefficient, Weir, Computational Fluid Dynamics, sharp-crested weir