Euler-Lagrangian Simulation of Bubble Migration in a Turbulent Boundary Layer

One-way coupled Euler-Lagrangian simulations of bubbles in a spatially evolving turbulent boundary layer were performed. The simulation parameters were chosen to match an experiment by Sanders et al. (2006), though the Reynolds number of the boundary layer was lower than experiment. The bubbles were observed to migrate away from the wall, as observed in experiment. Budgets of the forces on the bubbles, along with PDFs of these forces, were computed. A simulation of bubbles in a spatially evolving laminar boundary layer was also performed. The role of turbulence in bubble migration away from the wall is demonstrated by the force budgets in turbulent flow and results from the laminar simulation.