Abstract
A visual kinematic model of a cross-section through a flowing foam has been developed. A combination of Laplace's equation and visualization algorithms produces a kinematic model of a flowing foam with realistically shaped bubbles and coalescence. Laplace's equation provides a description of the motion of the bubbles within the foam and is shown to accurately predict experimental flow trajectories and residence times. Bubble visualisation was performed by moving bubble shapes along flow trajectories, and ensuring that all vertices meet at 120° and that volume is conserved. A coalescence criterion is defined based on bubble deformation. The results obtained from the dynamic, visual model are compared with results obtained from an experimental system. Close correspondence is achieved.
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