On the effect of turbulence on bubbles: Experiments and numerical simulations of bubbles in wall-bounded flows

Previous research has shown that the addition of gas bubbles to a turbulent boundary layer in water can reduce the local skin-friction drag by up to 80%. Application of this technique to ships seems promising, but to date no significant drag reductions are obtained on full-scale ships. More knowledge about the drag reduction mechanism is...

On the effect of turbulence on bubbles. Experiments and numerical simulations of bubbles in wall-bounded flows

Dispersion of bubbles in fully developed channel flow

Dispersion and preferential concentration of small, low Stokes number bubbles in horizontal turbulent channel flow is studied by DNS and experiments. A DNS of turbulent channel flow at Re = 360 with Lagrangian tracking of one-way coupled bubbles (d < n, St = 1.3×10?3) shows that equilibrium bubble concentration profiles can be described by a...