Abstract:

Bubble coalescence time is an important parameter in the study of coalescence behavior.By eliminating the influence of growth speed on coalescence time，a new laser detecting system was developed and used for precise measurement.The effects of bubble size，approaching velocity，diffusion of organic component and addition of electrolyte and surfactant on bubble coalescence were investigated.The result showed that bubble coalescence time would increase with increasing bubble size，delaying aging time，decreasing approaching velocity and increasing organic components concentration.