Modelování vlivů okolního prostředí na optický svazek v prostoru

Abstract

This thesis aims to explore the computer simulation possibilities of atmospheric effects which have significantly a negative effect on the transmission of information in the free space in the form of an optical beam. For this purpose it was necessary to describe the turbulent behavior of the atmosphere and to study the theoretical basics for the numerical description of the fluid flow. These findings have been applied at preparing the simulation tasks in software ANSYS Fluent based on the finite volume method.

The numerical model for the description of turbulent flow in a laboratory box was set on the comparison of simulation and measurement results. In the study of turbulent atmosphere simulation of thermal turbulence was also made. Furthermore, the thesis deals with the theoretical description of the aerosol effect in the atmosphere and condensation of water vapor in a laboratory box. Furthermore, the thesis deals with the theoretical description of scattering, absorption, effect of aerosols in the atmosphere and condensation of water vapour in a laboratory box. The simulation based on a model example studies the behavior of water particles in the formation of water vapour and motion of particle in turbulent flow.

The last part focuses on theoretical description of electromagnetic waves in the simulation software Ansys HFSS14. It is a theoretical analysis of the individual parts of optics and description of Gaussian pulse parameters. In application, working on the finite element method, the trajectory of the laser beam with a Gaussian intensity distribution is complied and its properties are analyzed during passing optical environment.