Figure 5: Relation between drift angle and force angle.
From: Passive appendages generate drift through symmetry breaking
(a) Schematics of a freely falling cylinder with a splitter plate. There is a balance between the force from fluid F and the gravitational force m g. The drift and turn angles are denoted by α and θs, respectively. (b) Schematics of a fixed cylinder with a splitter plate subject to a free stream; the force and turn angles are denoted by α and θs, respectively.
