Numerical modelling of radiant energy extinction by water medium containing bubbles and particles of various natures

O V Shefer,V V Loskutov

doi:10.1088/1742-6596/803/1/012144

Abstract

In the framework of the Mie theory, we developed a numerical model of weakly absorbing medium, containing particles having an arbitrary chemical composition. This model can be applied to the study of the extinction characteristics of the optical radiation by a water layer with gas bubbles or volume-shape particles. The results of the numerical experiment illustrate changes in optical properties of the water due to the presence of bubbles or solid particles. The work displays some calculations of the extinction efficiency factor, the extinction coefficient, and transmission function at visible wavelengths. The influences of concentration and sizes of gas bubbles on the extinction characteristics of optical radiation are illustrated. Features of the extinction of radiant energy are discussed as dependent on a size parameter and a complex index of refraction of scatterers.

Highlights

IntroductionA large amount of attention is given to an investigation and mastering of marine areas [1,2,3]
All over the world, a large amount of attention is given to an investigation and mastering of marine areas [1,2,3]
By using the presented numerical model, this paper focuses on discussing the results of the calculation of radiant energy extinction by the water layer containing bubbles

Summary

Introduction

A large amount of attention is given to an investigation and mastering of marine areas [1,2,3] This is due to the solution of problems of rational nature management and the need to control the environment. The mechanisms of interaction, leading to scattering of electromagnetic radiation, differ significantly from features of the sound scattering. An optical system allows the monitoring of a composition of aquatic environment with relatively small components (particle sizes are different from the wavelength of not more than several orders of magnitude); it is not possible to detect such components by using acoustic systems. Hydro-lidar systems can significantly extend the capabilities of remote sensing techniques of the ocean

Methods

Results

Conclusion