Figure 11

Pressure gradient ∆P and foam resistance factor as a function foam quality Γ. SDBS concentration was kept at 0.1 wt% and SiO2 nanoparticle concentration was 0.25 wt% or 1.00 wt%. Flow velocity ν was kept at 5 mm/s.

Pressure gradient ∆P and foam resistance factor as a function foam quality Γ. SDBS concentration was kept at 0.1 wt% and SiO2 nanoparticle concentration was 0.25 wt% or 1.00 wt%. Flow velocity ν was kept at 5 mm/s.