  Microorganisms develop coordinated beating patterns on surfaces lined with
cilia known as metachronal waves. For a chain of cilia attached to a flat
ciliate, it has been shown that hydrodynamic interactions alone can lead the
system to synchronize. However, several microorganisms possess a curve shaped
ciliate body and so to understand the effect of this geometry on the formation
of metachronal waves, we evaluate the hydrodynamic interactions of cilia near a
large spherical body. Using a minimal model, we show that for a chain of cilia
around the sphere, the natural periodicity in the geometry leads the system to
synchronize. We also report an emergent wave-like behavior when an asymmetry is
introduced to the system.
