Dimensionless Number	Expression
Froude number, $Fr$	$v_0^2/g{r}_0$
Reynolds number, $Re$	$\rho v_0{r}_0/{\eta }_0$
Weber number, $We$	$\rho v_0^2{r}_0/\gamma$
Electric Peclet number, $Pe$	$2\overline{ϵ}{v}_0/K{r}_0$
Deborah number, $De$	${\lambda }_0{v}_0/r_0$
Electrostatic force parameter, ${ϵ}_E$	$\overline{ϵ}{E}_0^2/\rho v_0^2$
Viscosity ratio, B	${\eta }_s/{\eta }_0$
Dielectric constant ratio, $\beta$	$ϵ/(\overline{ϵ}-1)$
Electric field strength, $\Omega$	$E_{\infty }/E_0$