Tobias Böhm

TL;DR: In this paper, the authors investigated the entrainment, deposition and motion of coarse spherical particles within a turbulent shallow water stream down a steep slope and developed a birth-death immigration-emigration Markov process to describe the particle exchanges between the bed and the water stream.

TL;DR: The motion of coarse spherical glass beads entrained by a steady shallow turbulent water flow down a steep two-dimensional channel with a mobile bed is investigated, revisited Einstein's theory on sediment and the statistical properties of the key variables such as the solid discharge and the number of moving particles are derived.

TL;DR: In this paper, the motion of coarse spherical particles on a mobile bed entrained by a shallow turbulent flow down a steep channel was filmed with a high-speed camera, and the water free surface and the particle positions were detected combining classical image processing algorithms.

TL;DR: Solid-discharge fluctuations were exacerbated when the bed was mobile because (i) the moving solid phase and the stationary bed exchanged particles and (ii) collective entrainment of particles occurred.

TL;DR: In this article, a two-size coarse spherical particle mixtures in a turbulent supercritical flow was analyzed with image and particle tracking velocimetry algorithms in a 2D flume.