Analysis of the Optical Scattering Direction by Mie Scattering Theory (CAT#: STEM-ST-0070-YJL)

Introduction

The motion of a ship in the ocean will disturb the sea water and form a wake behind the ship. Due to the rotating cavitation of the propeller, the breaking of sea waves, and the involvement of a large amount of air in the waterline, a bubble curtain belt containing a large number of bubbles is formed in the seawater at the tail of the ship, which is commonly referred to as bubble wake. From the perspective of physics, wake has acoustic, thermal, optical, magnetic, and electrical characteristics. The number of bubbles in the wake is huge and their diameters are different. Among them, large bubbles will rise quickly, break, and disappear, while small bubbles can survive in seawater for more than ten minutes or even dozens of minutes. Due to the obvious difference of bubble density, compressibility, and other parameters from seawater and the influence of turbulence in the wake, the bubble distribution in the wake is uneven, which leads to the obvious difference between the transmission characteristics of sound wave and light wave in the wake and that in seawater.