Benchmark Problem #2
Similar to Problem #1, the experiments chosen for this benchmark were conducted at the O. H. Hinsdale Wave Research Laboratory at Oregon State University. The goal was to measure debris movement of a large number of small particles over an unobstructed and obstructed beach. The debris consisted of rectangular wood and HDPE boxes and were placed in a group unconstrained on a flat section of the beach. A single wave crest was generated, and the debris was allowed to move with and without obstacles.
Complete details of the experiment can be found in the accompanying journal paper:
Park, H., Koh, M.J., Cox, D.T., Alam, M.S. and Shin, S., 2021. Experimental study of debris transport driven by a tsunami-like wave: Application for non-uniform density groups and obstacles. Coastal Engineering, 166, p.103867.
[local pdf]
For reference, here are a few videos of the configurations to be modeled:
Different from Problem #1, the non-obstacle cases (Cases 1, 2, and 3) for this benchmark are ideally suited to relatively simple debris transport models, perhaps even well-captured with a calibrated one-way coupled model.
Modelers are asked to simulate four different cases in this paper; one with obstacles (Case 4) and three without. Modelers may use their own hydrodynamic models, or they may use the Boussinesq-predicted wave results given below (for one-way coupled debris models). Modelers may also find the data comparison scripts in the modeled Boussinesq results useful.
Modelers are to provide comparisons with the mean distance traveled, lateral spreading, and longitudinal spreading for the cases. 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.
DOWNLOAD BENCHMARK DESCRIPTION : PDF DOC
DOWNLOAD DATASET: all_data.zip
DOWNLOAD SIMULATED HYDRODYNAMICS [FOR ONE-WAY DEBRIS TRANSPORT MODELING]: Hydro_data.zip