$V_{v\_d}$	Volume of the vanadium-deficient electrolyte (m3)
$C_{v\_d}$	Concentration of V(IV) ion in vanadium-deficient electrolyte (mol/m3)
$C_{v\_e}$	Concentration of V(IV) ion in vanadium-enriched electrolyte (mol/m3)
$P_{V\left(IV\right)}^m$	Permeability of V(IV) ion through membrane m (m2/s)
$t_m$	Thickness of ion-exchange membrane (m)
$A$	Area of the ion-exchange membrane (m2)
${\Lambda }_{V\left(IV\right)}^m$	Diffusive transport parameter of V(IV) ion through membrane m (m/s)