title: A simple collision model for small bubbles.
abstract: In this work, a model for the interaction force between a small bubble and a wall or another bubble is presented. The formulation is especially designed for Lagrangian calculations of bubble or soft sphere trajectories, with or without resolution of the continuous fluid. The force only relies on position and velocity of the bubble. The model does not include any empirical parameter that would have to be calibrated. Therefore, this force model is easy to implement. The formulation of the force is explicit, which means low computational effort. The collision of a small bubble with an inclined top wall is investigated numerically and experimentally. The computational results achieved with the new collision model show good agreement with the experiment.
authors.affiliation: Institute of Fluid Mechanics, TU Dresden, George-Bähr-Str 3c, 01069 Dresden, Germany.
authors.forename: Sascha
authors.initials: S
authors.lastname: Heitkam
authors.forename: Anna-Elisabeth
authors.initials: AE
authors.lastname: Sommer
authors.forename: Wiebke
authors.initials: W
authors.lastname: Drenckhan
authors.forename: Jochen
authors.initials: J
authors.lastname: Fröhlich