Journal
JOURNAL OF HYDROINFORMATICS
Volume 19, Issue 4, Pages 572-585Publisher
IWA PUBLISHING
DOI: 10.2166/hydro.2017.200
Keywords
90 degrees sharp bend; ANFIS model; back propagation; discharge; flow depth; velocity
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Investigating flow patterns in sharp bends is more essential than in mild bends due to the complex behaviour exhibited by sharp bends. Flow variable prediction in bends is among several concerns of hydraulics scientists. In this study, the adaptive neuro-fuzzy inference system (ANFIS) is applied to predict axial velocity and flow depth in a 90 degrees sharp bend. The experimental velocity and flow depth data for five discharge rates of 5, 7.8, 13.6, 19.1 and 25.3 L/s are used for training and testing the models. In ANFIS training, the two algorithms employed are back propagation (BP) and a hybrid of BP and least squares. In model design, the grid partitioning (GP) and sub-clustering methods are used for fuzzy inference system generation. The results indicate that ANFIS-GP-Hybrid predicts velocity best followed by flow depth.
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