${\mathsf{\theta }}_{\mathrm{w}}$	Water contact angle
${\mathsf{\theta }}_{\mathrm{oil}}$	Oil contact angle
A	Distance of pile filament
bc	Boundary condition
BOA	Bionic oil adsorber
C	Supplementary variable
CFD	Computational fluid dynamics
CFL	Courant–Friedrichs–Lewy
D	Diameter of pile filament
GIMP	GNU Image Manipulation Program
ICEM	ANSYS® ICEM CFD grid generation software
$\overrightarrow{n}$	Normal vector to the surfaces
NSE	Navier–Stokes equations
ρ	Density
p	Pressure
S	Length of pile filament
τ	Shear stress
t	Time
u	Velocity
voil	Oil transport velocity
V	Volume
VDI	Verein Deutscher Ingenieure e. V.
VoF	Volume of fluid