Fig. 6.

Equilibrium shape (Crescent $▵$, shell $◯$, and $c_2$ droplet $•$) and dimensionless time to equilibrium for CH (gray), CHS (red), CHSB $z$ (green), and CHSB $x$ (blue) models. Asymmetric buoyancy forces destabilize shell configurations, causing crescent formation. Pressure-driven pipe flow causes stronger recirculation, accelerating crescent formation by up to two orders of magnitude. Low $c_1$ concentrations instead diffuse out of the drop, leading to $c_2$-only drops.