Inter-compartment interaction in multi-impeller mixing: Part I. Experiments and multiple reference frame CFD

CFD simulations of mixing in single-phase multi-Rushton stirred tanks based on the RANS methodology frequently show an over-prediction of the mixing time. This hints at an under-prediction of the mass exchange between the compartments formed around the individual impellers. Some studies recommend tuning the turbulent Schmidt number to address...

Reliability of a dike influenced by a building: Development of a probabilistic method for slope stability of a dike containing a building inside the soil profile

In this research the reliability of dikes are studied that are influenced by the presence of buildings. Along many Dutch dikes (residential) buildings are present. These buildings may influence the reliability of the dike positevely and or negatively. In this study a probabilistic method is developed to determine the influence of a building,...

Interaction between flood defences and pipelines subject to induced earthquake loads in Groningen

In the province of Groningen in recent years strong induced earthquakes are observed, during which a lot of energy is released in the form of seismic waves. These ultimately lead to horizontal ground accelerations at the ground surface, which affect amongst other things the stability of embankments. The main question to be answered in this...

Cost optimal river dike design using probabilistic methods

This research follows a fully probabilistic approach in order to estimate the optimal design for a river dike cross-section, taking into account the investment costs. From the theory studied, the failure mechanisms that contribute most to the failure of river dikes are identified. These are overflowing, wave overtopping, piping and inner slope...

Effectiveness of sensors in flood defences

Introduction The popularity of monitoring dikes with sensor techniques is rising. It is claimed that sensor techniques lead to significant cost savings and can predict an upcoming dike collapse. But a technical foundation to use the sensor monitoring information in flood safety assessment is lacking. This research investigates the contribution...