Author

Sape Miedema

Sape Miedema

Sape obtained his MSc in Mechanical Engineering with honours at the Delft University of Technology in 1983 and his PhD in 1987. From 1987 to the present, he has been an assistant, then associate, professor at the Chair of Dredging Technology, then as a member of the management board of Mechanical Engineering and Marine Technology. From 1996 to 2001, he was appointed educational director of Mechanical Engineering and Marine Technology whilst remaining associate professor of Dredging Engineering. In 2005, he was additionally appointed educational director of the MSc programme of Offshore Engineering.

Articles By Sape Miedema

Modelling the waterjet cable trenching process on sand dunes

Cables for offshore wind farms in the North Sea are buried for protection. A highly variable seabed topography influences the trenching process in sandy soils. A model has been developed to estimate the influence of sand dunes on the trenching process.

DOWNLOAD PDF Document | 1,35 MB
Can a preliminary model describe CSD spillage due to centrifugal advection?
Can a preliminary model describe CSD spillage due to centrifugal advection?

Depending on its size and installed power, a Cutter Suction Dredger is capable of cutting a wide range of soil types. Although precise and relatively efficient, a CSD can spill significantly. The authors propose a preliminary model which describes spillage due to centrifugal advection.

DOWNLOAD PDF Document | 2,29 MB
Which slurry transport regime should be used and why?
Authors: Sape Miedema

With five possible flow regimes to choose from for slurry transport, selecting just one can require consideration. Fortunately, one of these regimes has a simple criterion: a ratio of the particle diameter to the pipe diameter.

DOWNLOAD PDF Document | 5,39 MB
Modelling the effect of water depth on rock cutting processes with the use of discrete element method
Modelling the effect of water depth on rock cutting processes with the use of discrete element method

Efficient rock cutting is still a challenge in the dredging industry. A new method that takes into account the effect of water depth could refine rock cutting processes.

DOWNLOAD PDF Document | 1,03 MB
Calculations on Forces and Velocities of a Submarine Narrow Trench Plough in Sandy Soil

Demand for submarine cables for exporting the energy from wind farms to shore is increasing. To prevent damage to the cables when exposed on the sea bed, adequate protection is critical, but current calculation methods are usually empirically extrapolated. To better predict towing forces, a new calculation method is given.

DOWNLOAD PDF Document | 5,24 MB