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Journal of Applied Mechanics and Technical Physics

2019 year, number 4

Effect of the Angular and Linear Parameters of Interaction of Water Droplets of Various Shapes on the Characteristics of Their Collisions

G. V. Kuznetsov1, A. K. Rebrov2, P. A. Strizhak1, N. E. Shlegel1
1Tomsk Polytechnical University, Tomsk, 634050 Russia
2Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: капли воды, форма, взаимодействие, столкновения, угловой и линейный параметры, отскок, коагуляция, разлет, дробление, water droplets, shape, interaction, collisions, angular andlinear parameters, rebound, coagulation, spreading, fragmentation


The influence of the dimensionless angular and linear parameters of interaction of water droplets shaped as a sphere, an ellipsoid, and a conventionally liquid disk on the characteristics (regimes) of their collisions in air (rebound, coagulation, spreading, or fragmentation) is studied by using a system of high-speed video recording. Conditions of stable realization of this interaction are determined. Charts of the corresponding regimes are constructed and compared with available data. The characteristic sizes, the number of liquid fragments formed in collisions, and total areas of the evaporation surface are calculated. It is demonstrated that the liquid surface area in the case of collisions of conventionally liquid disks is significantly (by several times) greater than that in the case of spherical droplets.