Author(s): Th. Wenka; W. Rodi; F. Nestmann
Linked Author(s): Th. Wenka
Keywords: No Keywords
Abstract: A depth-average calculation procedure is presented for flows in rivers with complex, irregu- lar geometry. The governing flow equations are solved with an efficient finite-volume method employing curvilinear boundary-fitted grids. Horizontal turbulent momentum exchange pro-cesses are simulated with a depth-average version of the k-ε turbulence model. The bed shear stress is calculated with the usual quadratic friction law involving locally varying Manning coefficients. The calculation procedure is tested by application to a flood situation of the river Rhine for which results obtained with uniform and varying Manning coefficients are compared and by application to an average flow situation of the river Rhine with groynes. The agreement with laboratory measurements is generally good.
Year: 1993