Parameter	Description	Unit
R	Radius of the jet	m
$Q_f$	Applied flow rate	m${}^3$/s
I	Total current	A
$r_0$	Radius of the capillary or the needle tip	m
v	Fluid velocity parallel to axis of jet	m/s
g	Acceleration due to gravity	m/s${}^2$
E	Electric field	V/m
$E_{\infty }$	Applied electric field	V/m
K	Solution conductivity	S/m
z	Vertical distance along the jet	m
L	Total contour length of the polymer molecule	m
n	Number of polymer molecules per unit volume	1
$k_B$	Boltzmann’s constant	m${}^2$ kg s${}^{-2}$ K${}^{-1}$
Z	Solvent quality parameter	1
T	Absolute temperature	K
$ϵ$	Fluid dielectric constant	1
$\overline{ϵ}$	Air dielectric constant	1
$\rho$	Solution density	kg/m${}^3$
$\alpha$	Swelling ratio	1
${\varphi }_0$	Initial concentration of polymer solution	1
$\gamma$	Surface tension	N/m
$\sigma$	Surface charge density	c/m${}^2$
${\eta }_0$	Zero shear-rate viscosity	N s/m${}^2$
${\eta }_s$	Solvent viscosity	N s/m${}^2$
${\eta }_{p,0}$	Polymer contribution to zero shear-rate viscosity	N s/m${}^2$
$\zeta$	Mean drag coefficient of polymer molecule	1
${\zeta }_0$	Equilibrium drag coefficient of polymer molecule	1
${\lambda }_0$	Relaxation time of the polymer solution	s
$\chi$	Aspect ratio	1
$\mathit{M}$	Conformation tensor	1
$\mathit{Q}$	End-to-end vector between the two beads	1
${\mathit{\tau }}_{\mathit{p}}$	Polymer stress	N/m${}^2$
$N_k$	Number of Kuhn steps	1
$\langle \rangle$	Angular brackets denote average values	−
${\langle Q^2\rangle }_0$	Mean squared end-to-end distance at equilibrium	m
$\langle Q^2\rangle /L^2$	Measure of change in conformation	1
B	Viscosity ratio	1
$De$	Deborah number	1
$Re$	Reynolds number	1
$Fr$	Froude number	1
$We$	Weber number	1
$Pe$	Electric Peclet number	1
${ϵ}_E$	Electrostatic force parameter	1
$\beta$	Dielectric constant ratio	1
$\Omega$	Electric field strength	1
$W{i}^{+}$	Weissenberg number	1