Measurement of flow visualized on surface of bubble blown in air |
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| Authors: | CA Acua J Radman JA Finch |
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| Institution: | aChemical Engineering Department, Universidad Católica del Norte, Antofagasta, Chile;bDepartment of Mining and Materials Engineering, McGill University, Montreal, QC, Canada |
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| Abstract: | Bubbles blown in surfactant (frother) solution reveal surface flows attributed to gravity drainage and opposing Marangoni Effect. A technique is introduced to visualize the flows and estimate trajectory velocity. The flow pattern and velocity depend on frother type (pentanol vs. a polyglycol) and concentration but no correlation with surface tension was found. The relevance of the observations to the action of frother in flotation is briefly discussed. |
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| Keywords: | Flotation Frother Surfactant Bubble Marangoni Effect |
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