Benchmark Problem #4
The experiments chosen for this benchmark were conducted at the tsunami wave basin of the Shibayama group at Waseda University. The goal was to measure debris movement of a small number of large particles through an array of obstacles. This benchmark also includes force-time histories measured by the debris, and is the only benchmark to include this information. The debris consisted of rectangular polyethylene "smart" boxes that were placed unconstrained on a flat section of the beach. A single wave crest was generated, and the debris was allowed to move up the beach, through the obstacle array.
Complete details of the experiment can be found in the accompanying journal paper:
Goseberg, N., Stolle, J., Nistor, I. and Shibayama, T., 2016. Experimental analysis of debris motion due the obstruction from fixed obstacles in tsunami-like flow conditions. Coastal Engineering, 118, pp.35-49.
[local pdf]
Modelers may simulate any of the different cases in this paper, and can provide comparisons with spreading angles (Figure 6 in paper) and force time histories (Figures 9 and 10 in paper). Modelers are encouraged to discuss various parameter changes used during the comparisons, such as grid size, time step, friction, breaking models, material properties, and any initiation and stopping thresholds for debris motion.
BENCHMARK DESCRIPTION AND DATA: website provided by authors