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Моделирование нелинейного развития возмущений в тонком жидком слое при волнообразовании

Authors: Prokudina, L. A.;

Моделирование нелинейного развития возмущений в тонком жидком слое при волнообразовании

Abstract

Представлена математическая модель волнового течения неизотермической жидкой пленки. Рассчитаны волновые характеристики течения: частота, инкремент, фазовая скорость при неоднородности поверхностного натяжения. Определены области существования волновых режимов вертикальной жидкой пленки. В рамках нелинейного параболического уравнения исследовано нелинейное развитие возмущений на свободной поверхности пленки. Показано, что в окрестности кривой нейтральной устойчивости проявляется эффект направленного переноса энергии к волнам в окрестности гармоники максимального инкремента. The mathematical model of the wave flow of a non-isothermal liquid film is shown. Wave characteristics (frequency, increment, phase velocity) are calculated under inhomogeneity of surface tension. The areas of wave modes of liquid film are determined. Within nonlinear parabolic equation nonlinear development of perturbances is analyzed. It is shown that there is a phenomenon of directed transfer of energy to the wave in the region of maximum increment. Прокудина Людмила Александровна – профессор, доктор физико-математических наук, кафедра прикладной математики, Механико-математический факультет, Южно-Уральский государственный университет. E-mail: prokudina-la@mail.ru. Prokudina Lyudmila Alexandrovna is Dr. Sc. (Physics and Mathematics), Professor, Applied Mathematics Department, South Ural State University. E-mail: prokudina-la@mail.ru

Keywords

instability, УДК 532.59, жидкая пленка, nonlinear parabolic equation, ГРНТИ 29.17, wave shapes, liquid film, неустойчивость, нелинейное параболическое уравнение, формы волн

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green