NUMERICAL SIMULATION OF UNSTABLE FLOW REGIMES OF A NON-ISOTHERMAL LIQUID FILM
https://doi.org/10.34822/1999-7604-2021-2-53-59
Abstract
The paper presents the results of numerical simulation of the flow of a thin liquid layer with a free surface. The simulation was performed at moderate Reynolds numbers within the framework of the partial differential equation for the state of the free surface of the film. Equation coefficients include various physicochemical factors, namely surface tension, and temperature gradients.
Computational experiments are carried out for a thin layer of a viscous liquid. The modes of free runoff, evaporation and counter flow are investigated. The values of the wave characteristics are found. The flows of a liquid film with the maximum value of the growth rate are identified. Such modes have been recorded in experimental studies by other scientists. The results of modeling the wave surface of a liquid film in Python are presented. The results can be used in the design or modernization of existing equipment, as well as in the development of technological processes in liquid films.
About the Authors
L. A. Prokudina
South Ural State University, Chelyabinsk
Russian Federation
Russian Federation
M. P. Vikhirev
South Ural State University, Chelyabinsk
Russian Federation
Russian Federation
E-mail: vikhirevmp@susu.ru
References
1. Актершев С. П., Алексеенко С. В. Волновое течение пленки конденсата // Теплофизика высоких температур. 2014. № 1. С. 84–92.
2. Актершев С. П., Алексеенко С. В. Волновое течение испаряющейся пленки жидкости // Известия Томского политехнического университета. 2014. № 4. С. 6–14.
3. Бурмистрова О. А. Устойчивость вертикальной пленки жидкости с учетом эффекта Марангони и теплообмена с окружающей средой // Прикладная механика и техническая физика. 2014. № 3. С. 17–25.
4. Subramaniam V., Garimella S. Numerical Study of Heat and Mass Transfer in Lithium Bromide-Water Falling Films and Droplets // International Journal of Refrigeration. 2014. Vol. 40. P. 211–226.
5. Rahimzadeh A., Ahmadian-Yazdi M.-R., Eslamian M. Experimental Study on the Characteristics of Capillary Surface Waves on a Liquid Film on an Ultrasonically Vibrated Substrate // Fluid Dynamics Research. 2018. Vol. 50, № 6.
6. D’Alessio S. J. D., Seth C. J. M. P., Pascal J. P. The Effects of Variable Fluid Properties on Thin Film Stability // Physics of Fluids. 2014. Vol. 26, № 12.
7. Прокудина Л. А. Влияние неоднородности поверхностного натяжения на волновое течение жидкой пленки // Инженерно-физический журнал. 2014. № 1. C. 158–166.
8. Прокудина Л. А. Моделирование влияния градиентов температуры на состояние свободной поверхности жидкой пленки // Вестник Южно-Уральского государственного университета. Сер.: Математическое моделирование и программирование. 2014. № 2. С. 118–123.
Review
For citations:
Prokudina L.A., Vikhirev M.P. NUMERICAL SIMULATION OF UNSTABLE FLOW REGIMES OF A NON-ISOTHERMAL LIQUID FILM. Proceedings in Cybernetics. 2021;(2 (42)):53-59. (In Russ.) https://doi.org/10.34822/1999-7604-2021-2-53-59
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