Kernel functions to flotation bubble size distributions

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific


The physical performance of flotation excessively determined by the bubble size distribution (BSD). Although the BSD can be measured the underlying effects of different variables causing changes in dispersion and coalescence rates producing changes in the measured BSD´s is not well understood. The bubble-fluid boundary chemistry affects the coalescence rate but the details of the mechanisms are not clear, as surfactants tend to fall under some distinct types of behaviour.
We discuss the effects of volumetric coalescence rate and its effects on the BSD measured at the quiescent zones of a flotation machine. The local flow conditions, and number concentration of bubbles in an observation volume will dictate the bubble collision probability while the bubble surface curvature and the surface properties will dictate the film drainage time for a successful coalescence. This type of a model allows the separate study of the two major kernel functions (dispersion and coalescence).
Original languageEnglish
Title of host publication8th International Flotation Conference (Flotation '17)
PublisherCurran Associates, Inc.
ISBN (Print)9781510853157
Publication statusPublished - 12 Nov 2017
MoE publication typeB3 Non-refereed article in conference proceedings
EventInternational Flotation Conference - Vineyard Hotel, Cape Town, South Africa
Duration: 13 Nov 201716 Nov 2017
Conference number: 8


ConferenceInternational Flotation Conference
Abbreviated titleFlotation '17
Country/TerritorySouth Africa
CityCape Town


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