Abstract
3D flow structures around sub-merged skewed spur dikes are numerically investigated. The basic equations of the numerical model are derived on a generalized curvilinear movable coordinate system with full-staggered arrangement of hydraulic variables. A 2nd order non-linear k-c model with effects of the strain parameter and the rotation parameter is adopted as a turbulence model to simulate the complex turbulent flows with separation and vortex shedding from the edge of the spur dikes. Numerical results are compared with the PIV measurements by Tominaga et al (2001) and the model performance is examined. The present numerical model could reproduce the fundamental aspect of the 3D turbulent flow features affected by the inclination angle of spur dikes.
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