Dispersed phase breakup at emulsion boiling

• Autorzy: Pavlenko A. M.
• Języki publikacji: EN

Abstrakty

EN

The processes of breakup and deformation of the dispersed phase is considered by many researchers [1-7], but these data require further study, which will determine the most profitable in economic and environmental terms parameters for their implementation. The classical theory of drops deformation and destruction depending on the turbulence level belongs to [3]. He considered this process as a result of realization of a large number of random events and on the basis of the probability theory he obtained the logarithmic drops distribution basing on the drops size. In general, the problem of breakup of liquid dispersions in a continuous medium is divided into two [3-5]: liquid droplets breakup in the emulsions and gas streams. When considering these processes the drop stability to the effecting forces is important, as these forces tend to destroy it. In most cases presented in references calculations are based on Bond and Weber criteria [1-4, 9], i.e. they consider only the Rayleigh-Taylor and Kelvin-Helmholtz instability, which are more specific for emulsification or destabilization of dispersed media. The droplets breakup and deformation processes while moving in a liquid are described in [3-5]. However, the existing models do not consider the breakup process of the secondary fluid with taking into account the formation of vapor layer at the boundary between the two phases as well as the force interaction regarding several simultaneously boiling particles of dispersed phase [8, 10, 11]. The vapor cavity formation is assumed to be homogeneous and only the maximum dynamic effects are considered, while the destruction of the dispersed phase can occur at any time due to the fact that the hydrodynamic environment even in the vicinity of two growing bubbles is undefined and if a particle of the dispersed phase is at some distance from these bubbles (or between them at a certain distance), then the effect of the particle breakup will be on reaching the maximum force that will exceed a critical value, calculated by Weber or Bond criteria, but it won’t necessarily be equal to maximum which can act in this system. The process becomes even more complicated and requires further study if we consider the breakup process of dispersed phase which begins to boil by itself.

Słowa kluczowe

EN

liquid dispersion; dispersed phase; breakup process

• Wydawca: Kielce University of Technology
• Czasopismo: Journal of New Technologies in Environmental Science
• Rocznik: 2017
• Tom: Vol. 1, nr 4
• Strony: 171--180
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr., wzory

Twórcy

autor

Pavlenko A. M.

• Kielce University of Technology, Poland

Bibliografia

• [1] Pavlenko A.M., Basok B.I., Heat Conduction of a Multi-Layer Disperse Particle of Emulsion. Heat Transfer Research, 2005, Vol. 36, Nos. 1&27, pp. 55-61.
• [2] Dolinskij A.A., Ivanickij G.K., The Theoretical substantiation of the principle of discrete-impulse input energy. The model of the dynamics of a single vapor bubble. Prom. Teplotehnika, 1995, v.17, No 5, pp. 3-28.
• [3] Шурчкова Ю.А., Малишевский Т.В., Анализ механизмов дробления капель при адиабатном вскипании и смешении дисперсных систем. Пром. Теплотехника, 2000, Т. 22, No 1, С. 17-23.
• [4] Иваницкий Г.К., Разрушение капель эмульсии в адиабатно вскипающих потоках. Пром. теплотехника. 1999, Т. 21, No 4-5, С. 10-15.
• [5] Olenets M.O., Piotrowski J.Z., Stroy A.F., Mathematical description of heat transfer and air movement processes in convectional elements of a building's passive solar heating systems, Energy Procedia, Vol. 57, 2014, p. 2070-2079.
• [6] Pavlenko A.M., Basok B.I., Regularities of boiling-up of emulsified liquids. Heat Transfer Research, 2005, Vol. 36, Issue 5, pp. 419-424.
• [7] Иваницкий Г.К., Моделирование процессов деформирования и дробления капель при движении в жидкости. Пром. Теплотехника, 1997, Т. 19, No 1, С. 9-16.
• [8] Pavlenko A.M., Koshlak A.V., The processes of heat and mass exchange in the vortex devices. Metallurgial and Mining Industry, No 3, 2014, pp. 55-60.
• [9] Долинский А.А., Павленко А.М., Басок Б.И., Теплофизические процессы в эмульсиях. Киев, Наукова думка, 2005, 265 с.
• [10] Павленко А.М., Климов Р.А., Динамика фазовых переходов в эмульсиях. Системні технології, 2006, No 4(45), С. 40-45.
• [11] Nigmatulin R.I., Habeev N.S., The dynamics and heat and mass transfer of gas-vapor bubbles with the liquid. Nekotorye voprosy mehaniki sploshnoj sredy. M.: Institute of Mechanics, Moscow State University, 1978, pp. 229-243.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).