Cees van Rhee

Since 1985, Cees has been engaged in research for the dredging industry. First at WL|Delft Hydraulics (now Deltares) and then from 1990-2011 at Van Oord. He obtained his PhD at the end of 2002 and since October 2007, he is professor of Dredging Engineering at Delft University of Technology, in the Netherlands. His scientific achievements are modelling of highly concentrated sediment water flows and high velocity erosion of granular sediments.

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Articles By Cees van Rhee

Pipeline design – density wave amplification and slurry dynamics

The effect of density waves and slurry dynamics on slurry pipeline flow assurance cannot be predicted with current slurry pipeline design methods. Current methods are based on steady-state assumptions, assuming that the mixture velocity and density are constant in time and in the pipeline. Therefore, using current design methods a dynamically stable pipeline cannot be guaranteed. Furthermore, new experiments in vertical pipelines show that density wave amplification is possible at mixture velocities far above the critical velocity. This article presents a new temporal design method based on 1D Driftflux CFD, which is able to model growing density waves.

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Can surface turbidity plume generation near a Trailing Suction Hopper Dredger be predicted?

A surface plume from overflow can stay suspended for long periods and distances, resulting in negative environmental impact through increased turbidity and sedimentation. Generation of a surface turbidity plume from the overflow of a Trailing Suction Hopper Dredger is investigated by a process-based, detailed Computational Fluid Dynamics model.

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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.

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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
Erosion Behaviour of a Draghead
Erosion Behaviour of a Draghead

The IADC Young Author Award-winning paper verifies the agreement between the theoretical calculations for a new toothless draghead and the real situation when the draghead is being used.

DOWNLOAD PDF Document | 2,59 MB