Wim S. J. Uijttewaal

TL;DR: In this paper, the exchange process between a groyne field and the main stream itself is examined and validated using a dead-zone prediction model, which treats the exchange as a first-order system.

TL;DR: In this article, the motion of dense particles in a turbulent gas flow has been studied by means of numerical simulations and it has been shown that for small particles the deposition process is governed by the properties of the nearwall layer where the wall-normal turbulence intensity is low, while for large inertial particles turbulent dispersion determines the chances for particles to hit the tube wall.

TL;DR: In this article, the authors compared the performance of a large number of models on flow resistance, vegetation drag, vertical velocity profiles and bed-shear stresses in vegetated channels.

TL;DR: In this paper, the development of two shallow mixing layers with different water depths is analyzed experimentally by means of laser Doppler anemometry, and the experiments show that bottom friction plays an important role in the growth of the mixing layer width and in the strength and dimensions of the large quasi two-dimensional turbulence structures therein.

TL;DR: In this article, the effects of horizontal coherent structures moving on an uneven bottom, taking compression and stretching of the vortices into account, were modeled using a newly developed effective eddy viscosity concept.