Prof.Akira Nakayama
Shizuoka University, Department of Mechanical Engineering, Heat transfer, Fluid mechanics, Viscous flow, Convection, Porous media
"A porous media theory for determination of the limiting
current density in an electrodialysis desalination"
Abstract:
A local volume averaging theory for porous media was also introduced to describe the transport phenomena within an electrodialysis stacks with spacers. The results based on the porous media theory are compared against available experimental data. The predicted limiting current density and stack voltage based on the asymptotic solutions for sufficiently short channels agree well with those of measurements, revealing the validity of the present analysis based on the local electro-neutrality assumption. It has been clearly shown that the spacers work to delay possible depletion of the ions on the dilute side of the membrane, thus increasing the limiting current density.