Theoretical Considerations, Flow Visualization and Pressure Measurements for Rear-End Collisions of Two Unequal Solitary Waves
Abstract
This paper discusses some theoretical results and some visualization techniques such as particle image velocimetry (PIV), particle tracking velocimetry, particle mask correlation (PMC), and image thresholding. These are used to examine the wave dynamics and kinematics of the rear-end collision of two unequal solitary waves. Spatial surface profiles during the interaction were measured in detail using several photos with the PMC method. The velocity-field measurements of the compound waves were conducted using the super-resolution PIV that consists of an 8-W ND:YAG laser and a high-speed CCD camera. We investigated, independently, three types of surface profiles and velocity fields: smaller, taller, and compound waves in the rear-end collision period. In addition, the dynamic pressure was determined to help our understanding of the nature of the interactions; this was accomplished by using small pressure transducers placed at various locations throughout the water depth.
- Publication:
-
Journal of Mathematical Fluid Mechanics
- Pub Date:
- March 2019
- DOI:
- 10.1007/s00021-019-0417-6
- Bibcode:
- 2019JMFM...21...12U
- Keywords:
-
- Solitary waves;
- Rear-end collision;
- PIV;
- PMC;
- Dynamic pressure;
- Primary 76B25;
- Secondary 76B07