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4 May 2011 Infrared imaging of surface waves interaction with a submerged object
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The goal of this study is to investigate thermal signatures left at the water surface by waves interacting with a submerged sphere. Two possible mechanisms for the appearance of detectable signatures are identified: 1) turbulence generated by the interaction of the wave's orbital motions and the sphere propagates away from the sphere and disturbs a pre-existing thermal gradient, and 2) the sphere is sufficiently close to the water surface to cause shoaling waves, which break and disturb the thermal gradient. In both cases if the existing thermal gradient and the turbulence intensity are 'strong enough' a detectable thermal signature will be left. In this laboratory study a high-resolution infrared camera was used to observe these temperature fluctuations for a variety of cases. Spheres of 3 different diameters were rigidly mounted at different depths and subjected to mechanically generated waves of varying amplitude. A set of critical conditions for the appearance of detectable signatures is identified and possible scalings are discussed.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ivan B. Savelyev and Geoffrey B. Smith "Infrared imaging of surface waves interaction with a submerged object", Proc. SPIE 8030, Ocean Sensing and Monitoring III, 803007 (4 May 2011);

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