https://doi.org/10.1051/epjconf/201818002061
Experimentally determined distribution of granular-flow characteristics in collisional bed load transport
1
Czech Technical University in Prague, Faculty of Civil Engineering, 166 29 Prague 6, Czech Republic
2
University of Trento, Department of Civil, Environmental and Mechanical Engineering, Trento, Italy
3
Free University of Bozen-Bolzano, Department of Science and Technology, Bolzano, Italy
* Corresponding author: v.matousek@fsv.cvut.cz
Published online: 4 June 2018
A series of laboratory experiments on turbulent open-channel two-phase flow in a form of intense bed load transport is reported. Measurements in a laboratory tilting flume included camera based imaging techniques to identify the structure of the flow at the local level. Obtained experimental distributions of two-phase flow related parameters - granular velocity, concentration, and temperature - across a collisional transport layer are discussed. The results are analysed together with additional measured quantities (discharges of mixture and grains, flow depth, bed slope etc). Our major goal is to evaluate the distribution of granular stresses across the transport layer with a special attention paid to the interface between the transport layer and the bed. Furthermore, comparisons are discussed between the experimental results and predictions produced by suitable kinetic-theory based models.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
