Figure 10

Logarithm of pressure gradient ∆P for foam flow in a crack vs logarithm of flow velocity v at two foam qualities: 85% and 95%. SDBS concentration was kept at 0.1 wt% and SiO2 nanoparticle concentration was varied from 0.25 wt% to 1.00 wt%.

Logarithm of pressure gradient ∆P for foam flow in a crack vs logarithm of flow velocity v at two foam qualities: 85% and 95%. SDBS concentration was kept at 0.1 wt% and SiO2 nanoparticle concentration was varied from 0.25 wt% to 1.00 wt%.