Stationary nonlinear waves at the surface of a thin liquid layer under inverted gravitation conditions

• Дата: 2004
• Автори: Kolmakov, G.V., Lebedeva, E.V., Levchenko, A.A., Mezhov-Deglin, L.P., Trusov, A.B., Shikin, V.B.
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2004
• Назва видання: Физика низких температур
• Теми: Низкотемпеpатуpный магнетизм
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/119197
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Stationary nonlinear waves at the surface of a thin liquid layer under inverted gravitation conditions / G.V. Kolmakov, E.V. Lebedeva, A.A. Levchenko, L.P. Mezhov-Deglin, A.B. Trusov, V.B. Shikin // Физика низких температур. — 2004. — Т. 30, № 1. — С. 79-93. — Бібліогр.: 24 назв. — англ.

Instability of the flat surface of a thin liquid layer wetting a solid substrate under inverted gravitation conditions is discovered. The development of this instability leads to formation of a new stationary nonuniform liquid surface state. It looks like a solitary hill with characteristics sensitive to the liquid film parameters, particularly to the layer thickness at which the instability begins to develop. By application of a variational approach the mechanical stability of such a hill (droplet) in the one-dimensional approximation is proved. A variational picture of the shape evolution for a cylindrical charged droplet in an external electric field is constructed, too. The results obtained are compared with an experiment on liquid hydrogen droplets [A.A. Levchenko, G.V. Kolmakov, L.P. Mezhov-Deglin, M.G. Mikhailov, and A.B. Trusov, Low Temp. Phys. 25, 242 (1999)]. The theory developed is in good agreement with the results of experiments.