3D hydrodynamical simulation of an eccentric binary with a red-giant primary (M₁ = 1.5 M_⊙) and a low-mass companion (M₂ = 0.125 M_⊙). The orbit has semi-major axis a = 2.3 au and eccentricity e = 0.3; the dust–condensation radius is R_cond = 3 au, the orbital period is 1000 days. The online video shows the optical-depth maps in a slice through the orbital plane. The red-giant primary is at the origin (0, 0); the low-mass companion lies to the right in each panel.