V0 20[V] "Electric potential"
er_w 80 "Dielectric constant for water"
ew er_w*epsilon0_const "Permittivity of water"
zeta -0.1[V] "Zeta potential at channel walls"
sigma 20[um] "Standard deviation of gaussian pulse"
D 1e-11[m^2/s] "Species diffusivity"
rho0 1000[kg/m^3] Density
mu0 1e-3[Pa*s] Viscosity
L_av 2*L+pi*(r2-r1) "Total average channel length"
E_av V0/L_av "Electric field based on avg. length"
u_av abs(ew*zeta*E_av/mu0) "Avg. slip velocity"
Pe u_av*(r2-r1)/D "Peclet number"
Re u_av*(r2-r1)*rho0/mu0 "Reynolds number"
xm -600[um] "Location of gaussian pulse"
c0 1[mol/m^3] "Initial peak concentration"