The figure shows stability characteristics for two different models of electrode processes, at similar ionic conditions. The demarcation between stability and instability in a standard two-electrode arrangement. These results illustrate the cell's sensitivity to the nature of the electrode processes. The predicted potential, velocity, and concentration disturbances in a standard electrochemical cell model. Previous treatments of these phenomena predict motion when electric fields are large enough, independent of polarization layers.
Polarization is an essential feature of systems with flow.
In the experimental part, flows in the region between two homogeneous electrodes will be studied to identify conditions for electrohydrodynamic stability. With patterned electrodes, flow is engendered by lateral current inhomogenities on an electrode. Because currents are low and the cells thin, buoyancy driven convection is weak and the experimental set-up is relatively simple. Flow visualization techniques will be used to image the flows. M.E. Buchanan and D.A. Saville, Phys.