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Thermophysics and Aeromechanics

2020 year, number 5

Bubble diameters variation along the gas-liquid flow in a flat channel at various inclination angles

A.E. Gorelikova1,2, V.V. Randin1,2, A.V. Chinak1
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: flat channel, gas-liquid flow, bubbles, bubble diameters, histograms

Abstract

The results of an experimental study of a bubble diameters variation with a distance from the gas injection point in an upward bubbly flow in an inclined flat channel are presented. The measurements were carried out for a superficial liquid velocity of 0.51 m/s (Re = 12400) and various volumetric gas flow rate ratios. It is shown that at low values of volumetric gas flow rate ratio ( β < 2 %) there is almost no bubble coalescence; therefore, the channel inclination angle and distance from the point of gas injection into the liquid flow do not affect the average diameter of gas bubbles.