EXPERIMENTAL STUDY OF THE MOVEMENT OF SINGLE LARGE BUBBLES IN A CLOSED VERTICAL TUBE
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The present paper reports an experimental study of the movement of single Taylor bubbles in a closed vertical tube with stagnant liquid. The rising velocity and length of the rising bubbles, and the thickness of the falling liquid films around the bubbles were measured by using the pulse-echo ultrasonic technique for air bubbles rising in water, glycerin and water-glycerin solutions. The influence of the liquid viscosity on the interfacial parameters were investigated. The experimental results were compared with values calculated according to Goldsmith and Mason (1962)’s model and Brown (1965)’s model, revealing that the first model is limited by a thin-film assumption and the second have good agreement for intermediate and low viscosity fluids. It was observed that the bubble velocities decrease and the film thicknesses increase with increasing viscosity.Referências
De Azevedo, M.B., Faccini J.L.H. and Su, J.; Proceedings of 15th Brazilian Congress of Thermal Sciences and Engineering, Belém, PA, Brazil (2014). ENCIT2014-83.
Goldsmith, H. L. and Mason, S. G. "The Movement of Single Large Bubbles in Closed Vertical Tubes", Journal of Fluid Mechanics, V.14, No.1, pp. 42-58, (1962).
Brown, R. A. S. "Mechanics of Large Gas Bubbles in Tubes – 1.Bubble Velocities in Stagnant Liquids", Canadian Journal of Chemical Engineering, V. 43, No. 5, pp. 217 – 223, (1965).
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2015-12-04
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de Azevedo, M. B., Faccini, J. L. H., & Su, J. (2015). EXPERIMENTAL STUDY OF THE MOVEMENT OF SINGLE LARGE BUBBLES IN A CLOSED VERTICAL TUBE. Instituto De Engenharia Nuclear: Progress Report, (2), 58. Recuperado de https://revistas.ien.gov.br/index.php/ienprogressreport/article/view/166
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Engineering and Reactor Safety
