For a proper management of rivers and river bends in particular, it is important to have good models to predict the flows through bends. It is important that those developed models are well validated with measurements to demonstrate the usefulness of the models. This research is a validation of the Delft3D-FLOW model which is a model that is often used in practice. For the validation, detailed measurements of flows through a sharp bend (radius/width < 2 a 3) flume, performed at the EPFL (Lausanne, Switzerland) and Large Eddy Simulations (LES) conducted at the TU Delft are used. The objective of this study is to analyze to what extent Delft3D-FLOW is able to predict the hydrodynamic processes in sharp open channel bends. This study contains the comparison of several important quantities of Delt3D-FLOW simulations, measurements and LES