Тонкая структура распределения вещества составной капли в принимающей жидкости в режиме формирования всплеска


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Fine Structure of the Compound Drop Substance Distribution in the Target Fluid in the Splash Formation Mode

The evolution of the regular fine structure of the distribution pattern of a colored substance during the spreading of a freely falling compound drop in deep water was traced for the first time using technical photo and video recording methods. The flow pattern was studied at the initial stage of the formation of the cavity and crown during the merging of a compound drop, the core of which, a drop of alizarin ink solution, was covered with an oil shell. Banded struc-tures were observed in the distribution of the colored liquid at the bottom of the cavern and the walls of the crown. The formation of banded elements of the flow pattern is associated with the influence of the processes of conversion of available potential surface energy (APSE) dur-ing the destruction of the contact surfaces of merging liquids. The position of the nucleus in the drop was not controlled and was determined by the formation conditions. The breakdown of the ink core into fibers was observed in all experiments in this series. The area of coverage of the surface of the cavity and the crown with the colored liquid reached a maximum at the central position of the core.

compound drops, experiment, cavity, crown, fiber structures

DOI: http://doi.org/10.33257/PhChGD.24.5.1073

Юлий Дмитриевич Чашечкин, Андрей Юрьевич Ильиных, Шамиль Хаирбекович Хайирбеков

Том 24, выпуск 5, 2023 год



Эволюция регулярной тонкой структуры картины распределения окрашенного вещества при растекании свободно падающей составной капли в глубокой воде впервые прослежена методами технической фото- и видеорегистрации. Изучалась картина течения на начальном этапе формирования каверны и венца при слиянии составной капли, ядро которой – капля раствора ализариновых чернил, было покрыто масляной оболочкой. В картине распределения окрашенной жидкости на дне каверны и стенках венца наблюдались полосчатые структуры. Формирование полосчатых элементов картины течений связывается с влиянием процессов конверсии доступной потенциальной поверхностной энергии (ДППЭ) при уничтожении контактных поверхностей сливающихся жидкостей. Положение ядра в капле не контролировалось и определялось условиями формирования. Распад чернильного ядра на волокна наблюдался во всех опытах данной серии. Площадь покрытия поверхности каверны и венца окрашенной жидкостью достигала максимума при центральном положении ядра.

составные капли, эксперимент, каверна, венец, волокнистые структуры.

DOI: http://doi.org/10.33257/PhChGD.24.5.1073

Юлий Дмитриевич Чашечкин, Андрей Юрьевич Ильиных, Шамиль Хаирбекович Хайирбеков

Том 24, выпуск 5, 2023 год



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