Table 3.

Constriction channel geometry designs.

Constriction Geometry		Design Purpose	References
Straight		Droplet breakup	[30]
Tapered/ conical		Droplet breakup	[27]
Sinusoidal/ cosine		Oil trapping, droplet breakup	[31]
Double-bend		Provides deformation and rotation	[25]
Saw-tooth-shaped		Directional transportation by periodic half-open capillary channels	[32]
Hyperbolic channel		Capsule dynamics, encapsulate droplet	[33]
Shark teeth		Provides rapid deformation	[34]