Fig. 13From: A numerical shallow-water model for gravity currents for a wide range of density differencesTwo-layer PDC model schematic. In the overlying dilute layer, the thickness h L, velocity u L, bulk density ρ L, particle volume concentration ϕ sL, and air volume concentration ϕ aL evolve both temporally and spatially. In the underlying dense layer, the thickness h H and velocity u H evolve both temporally and spatiallyBack to article page