High-Velocity Erosion of Sand

Dredging is the relocation of soil. Before the soil can be transported, it has to be loosened. This can be done hydraulically (jetting) or mechanically (cutting). Often, water jets are used to erode the soil layer. Over time, pickup functions have been derived to predict the amount of erosion corresponding to the flow conditions. However,...

Modeling the hydraulic excavation of cohesive soil by a moving vertical jet

In dredging, high pressure water jets are commonly applied to assist the mobilization of soil. This work considers the excavation of cohesive soil. The key objective is to predict the development of the cavity in the soil as a function of the undrained shear strength, translation velocity and hydrodynamic pressure of a single nozzle. A...

VALIDATION AND VERIFICATION OF PLASTIC AXISYMMETRIC COLLAPSE CRITERIA OF RING-STIFFENED PERFECT CYLINDRICAL SHELL UNDER EXTERNAL HYDROSTATIC PRESSURE

On the excavation process of a moving vertical jet in cohesive soil

In dredging practice jetting is widely used for the excavation of soil. In this study the jetting process of a moving vertical jet in cohesive soil has been investigated. A number of jet tests were conducted on artificially prepared cohesive soil samples. The observed failure mechanisms are discussed. A calculation model to predict the jet...

On the excavation process of a moving vertical jet in cohesive soil

Measurements of the stagnation pressure in the center of a cavitating jet

Measurements of the stagnation pressure in the center of a cavitating jet

The stagnation pressure at a certain distance from the nozzle is important for the erosion/ cutting capacity of a submerged jet in dredging. The decay of the stagnation pressure with jet distance is well known in the case of non-cavitating jets. It is also known that cavitation causes the rate of decay to decrease. Under conditions of cavitation...

Logistics improvement at a tank container services terminal. A simulation study

Logistics improvement at a tank container services terminal. A simulation study (summary)

Logistics improvement at a tank container services terminal. A simulation study (summary)

Conceptueel ontwerp van een automatische labeldispenser

Conceptueel ontwerp van een automatische labeldispenser (summary)

Systems and equipment for the storage of biomass products (summary)

Systems and equipment for the storage of biomass products

Systems and equipment for the storage of biomass products (summary)

Acrylic polymer nanocomposite resins for water borne coating applications

Due to environmental and safety regulations the use of volatile organic components (VOC's) containing lacquers for exterior automotive purposes is under growing pressure. As a consequence there is a demand for more environmentally friendly alternatives like water borne coatings, high solid coatings, powder coatings and radiation cured coatings....

Cavitating jets for dredging clay?

The age of the veritic volcanism in SE Spain

: The Vera Basin is one of the Neogene intramontane basins of the Betic Cordilleras of SE Spain.