Measurements and Computations of the Turbulent Flow Field above Fixed Bed-Forms

摘要

The results are presented of computations carried out with two mathematic modelsfor the simulation of the flow field over bed-forms in rivers. The models, predicting the flow field in a vertical plane are: the WABED model, a one-dimensional model based on the boundary-layer theory; and the ODYSSEE model, a two-dimensional model in which a kappa-epsilon model is used. The computations with both models were carried out for two reasons: (1) To obtain results of the application of both models, to see to what extent a measured flow field is reproduced and in particular the turbulent shear stress and pressure distribution along bed-forms. (2) To compare the results of both models, with results of measurements in order to verify or calibrate the models.