The paper is devoted to development of the optical electronic setup for carrying out measurements by multicolor particle image velocimetry. The main advantage of this method is the ability to visualize vector velocity fields in several planes simultaneously. As a result a 3D model of a setup was developed, a laboratory sample was assembled and series of testing experiments were performed. As a test object, vortex structure formed by a chemical stirrer in a cuvette with liquid has been considered. The experimental data were compared with the computer model developed in SolidWorks and FlowVision software.
In the paper the possibility of developing an optical method for colloidal solutions diagnostic based on elastic light scattering was investigated. The scheme of the experimental setup for light scattering indicatrix registration was presented, and the results of its work were demonstrated. The algorithm and the program of experimental data processing have been developed. Experimental light scattering indicatrices with 434, 546 and 656 nm wavelengths in a colloidal sulfur solution have been obtained. The scattering indicatrix models dynamics with changes in the scattering center size were presented. Qualitative comparison of the experimental and model results was carried out.
The paper deals with the elastic light scattering on spherical absorbing particles phenomenon and the method of its quantitative description in the framework of the theory of G. Mi. An algorithm for calculating the scattered radiation relative intensity in an arbitrary direction has been developed and a modeling 3D scattering indicatrices program has been obtained. The models of 3D indicatrix scattering laser linearly polarized radiation on transparent and absorbing spherical particles are presented. The analysis of the light absorption effect on the relative angular distribution shape of the scattered radiation intensity on particles of various sizes has been carried out.The dy namics of the scattering 3D indicatrix shape on an absorbing particle as its radius changes has been visualized. The potential areas of the program practical application have been identified. The factors limiting to use program for calculations of scattering on real particles systems has been revealed.
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