An investigation of bubble coalescence and post-rupture oscillation in non-ionic surfactant solutions using high-speed cinematography

Characterisation of frother properties in coal preparation process water

“…Bubbles produced at the end of capillary tubes were brought in contact and observed with a high-speed camera following the principle of Ata (2008) with the exception that bubbles were brought into contact using a linear actuator (Bournival et al, 2012(Bournival et al, , 2014a instead of being blown side-by-side.…”

“…This phenomenon may imply that the surface tension and its associated properties (i.e. surface elasticity), although strongly affecting the coalescence time, was not the only parameter playing a role in the coalescence time (Wang and Yoon, 2008;Bournival et al, 2014a). Alternatively, the presence of contaminants such as inorganic electrolytes may not have been clearly detected through the surface tension measurements but may readily be observed through the coalescence time since the coalescence of bubbles seems to be a more sensitive test to detect the presence of contaminants .…”

Dynamics of drops — Formation, growth, oscillation, detachment, and coalescence

“…For example, Bournival et al [41] studied the process of coalescence between bubbles in surfactant solutions, measuring the coalescence time for different surfactant concentrations. Regarding the interaction between drops, Ata et al studied the coalescence behavior of industrial kerosene oil drops [42].…”

“…Loglio et al have presented such an experimental tool in [43]. Other authors introduced qualitative set-ups only for the observation of the coalescence of two objects which has perpendicularly arranged capillaries [41,42,[44][45][46]. In contrast, the DBMM allows not only a visual inspection of the interaction between drops or bubbles but also provides quantitative investigations with video registration and capillary pressure monitoring.…”

Foaming and gas holdup of esterified nanoparticle dispersions in the presence of sodium chloride

“…The effect of trace amounts of acetone on the stability of bubble pairs was investigated by measuring the coalescence time of bubble pairs using the methodology outlined in [13]. For the purpose of evaluating the effect of acetone concentration on bubble coalescence, no salt or buffer was added (unlike the foaming experiments).…”