![Instrumented oscillatory flow tunnel outfitted with rough-surfaced false floor.](images/FalseFloorExpSetUp.jpg) |
1. Photograph of an instrumented oscillatory flow tunnel outfitted with rough-surfaced false floor. |
![Planar laser and aSOA placement in incipient motion experiments.](images/FalseFloorSetUpWithLaserLine.jpg) |
2. Photograph of a planar laser and an aSOA placement in incipient motion experiments. |
![Oscillatory flow tunnel outfitted with a movable sand floor, black cloth backdrop, and instrumentation.](images/MovingBedSetUp.jpg) |
3. Photograph of an oscillatory flow tunnel outfitted with movable sand floor, black cloth backdrop, and instrumentation. |
![Buried and unburied round (A) and ellipsoidal (B) aSOAs deployed in the sea floor interaction experiments.](images/MovingBedBuriedUnburiedASOA.jpg) |
4. Photographs of buried and unburied round (A) and ellipsoidal (B) artificial sand and oil agglomerates deployed in the sea-floor interaction experiments. |
![GoPro© camera deployed in the oscillatory flow tank in the trough of the rippled sand bed. Also in view are round (green) and ellipsoidal (red) 2.5 cm aSOAs.](images/GoProDeployment.jpg) |
5. Photograph of a GoPro camera deployed in the oscillatory flow tank in the trough of the rippled sand bed. |
![Tightly (A) and loosely (B) arranged aSOAs to simulate a mat deployment of SOAs.](images/MovingBedASOAMats.jpg) |
6. Photographs of tightly (A) and loosely (B) arranged artificial sand and oil agglomerates to simulate a mat deployment of sand and oil agglomerates. |
![Reference checkerboard placed in the tank after the experiments (A) and the automatically extracted grid corners found during image processing (B).](images/CheckerBoardAndCornerExtraction.jpg) |
7. Photographs of reference checkerboard placed in the tank after the experiments (A) and the automatically extracted grid corners found during image processing (B). |
![Plot of aSOA diameter vs. shear stress on a log scale.](images/ASOA_DiameterVsStress.jpg) |
8. Plot of artificial sand and oil agglomerate diameter versus shear-stress on a log scale. |