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In curved channels, velocity distribution in the main flow direction is transformed by the secondary currents and the strength of secondary circulation is varied with the transformation of downstream velocity. Therefore, it is necessary to consider the interaction between main and secondary flows. In this study, a depth averaged flow model in curved channels in generalized curvilinear coordinate system is refined, by including this interaction. The model is applied to the experiments by Rozovskii for uniformly curved channel flow and compared with both the experimental and 3-D results.

REFINEMENT OF A DEPTH AVERAGED MODEL IN CURVED CHANNEL IN GENERALIZED CURVILINEAR COORDINATE SYSTEM AND ITS VERIFICATION