Lamella Division in a Foam Flowing through a Two-Dimensional Porous Medium: A Model Fragmentation Process
Abstract
We flow a 2D foam through a model 2D porous medium and study experimentally and numericallyhow the bubble size distribution evolves along the medium. The dominant mechanism of bubblecreation is a fragmentation process occurring when bubbles pinched against obstacles are split in twosmaller bubbles. We infer the statistics of these individual and local fragmentation events from theexperimental data and propose a fragmentation equation to relate that statistics to the evolutionof the global size distribution. The predicted evolution shows very good agreement with directexperimental measurements of the bubble size distribution.
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