Bodnarchuk J. Reducing ship drag through the use of recesses and air lubrication

The dissertation research presents the means of reducing the resistance of the vessel in the form of local transverse depressions on the bottom surface of different types of vessels and depressions in the form of rings on the surface of submarines, as well as the effect of air oil on the surface of the speedboat. The dissertation consists of an introduction, three sections, conclusions, a list of used sources and appendices. The paper describes an algorithm for constructing computational projects in computational fluid dynamics complexes Flow Vision and Flow Simulation. During the creation of the computational project, parametric analysis is performed using computational fluid dynamics methods. The modeling parameters are determined in order for the algorithm of differential equations describing the motion of a fluid to work, the method of finite volumes, which reduces them to a system of linear algebraic equations. The process of validation of the software product Flow Vision and Flow Simulation in modeling the flow around the hulls of ships was carried out for a model tanker of project 005RST01 and an underwater cigar-shaped object in various research basins. Comparison of the results of calculations in the indicated software complexes with the data of physical experiments showed a very high information content and the accuracy of these programs sufficient for practical use.