r |
radial coordinate in cylindrical coordinates |
h |
distance between no-slip walls in the z direction in experiment, simulation and theory |
μ |
liquid viscosity |
u |
liquid velocity field |
p |
liquid pressure field |
rsp
|
distance between the origin (centre of forcing) and the eddy centre |
a |
radius of living or model Vorticella depending on context |
θ |
polar coordinate in cylindrical or spherical coordinates depending on context |
ϑ |
the co-latitude in cylindrical coordinates ϑ = π −θ
|
k |
permeability used in Brinkman approximation |
β |
proportionality constant in the definition of k
|
γE
|
Euler–Mascheroni constant |
ρ |
radial coordinate in spherical coordinates |
w |
width of chamber in simulations |
b |
length of chamber in simulations |
ℓst
|
the length of the Vorticella stalk |
rspl
|
the eddy size for a sphere located above a single plane boundary |