Some animations of the results are given below in longitudinal profiles. Red shows high values of velocity/concentration and blue shows low values. The runs are with different variations of discretization schemes, free surface algorithms and boundary conditions. The flow direction is from the left to the right in the animations. Note that some of the files are very large.
Download velocity video (9 MB) of a section of the antidunes. This is from one of the first runs, where instabilities occurred after a short time.
Download velocity video (146 MB) of the whole flume.
Download concentration video (113 MB) of the whole flume.
The two animations above are from the same run, which lasted for 160 seconds.
Download velocity/concentration video (169 MB) of a section of the flume.
Download velocity/pressure video (211 MB) of a section of the flume.
The two animations above are in real-time and shows a section from another run.
Download video of concentrations, velocities and pressure (1600 MB) of the whole flume for a 1000 second run. The animation is 5x faster than the real time.
Download video of antidunes (42 MB) in the Bodendorf hydropower reservoir in Austria during sediment flushing.
References:
Francisco Núñez-González and Juan P. Martín-Vide (2011), Analysis of antidune migration direction, Journal of Geophysical Research: Earth Surface. Volume 116, Issue 2, 2011, Article number F02004.
Francisco Núñez-González and Juan P. Martín-Vide (2010), Downstream-migrating antidunes in sand, gravel and sand-gravel mixtures, RiverFlow 2010, Braunschweig, Germany.
Nils Reidar B. Olsen (2017), Numerical modelling of downstream-migrating antidunes, Accepted to Earth Surface Processes and Landforms. doi:10.1002/esp.4193.
Nils Reidar B. Olsen (2016), Numerical modelling of antidune formation and propagation, International Symposium on River Sedimentation, Stuttgart, Germany.
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