(652f) Dispersive Mixing Effect Caused By Combined Effect Of Channel Morphology And Electrophoretic Mobility In Poiseuille Flows

Several electrokinetic processes (i.e. electro-assisted drug delivery, micro-electrophoretic separations, soil remediation, and material processing) can be optimized if the key parameters, i.e. driving factors for separation and mixing, are identified and manipulated to enhance the operation efficiency. The morphology of the capillary channel can modify the hydrodynamics of the system and the electrostatic characteristics of the walls can influence the electroosmosis. Collectively, these factors have an effect on the dispersive mixing phenomena. In this contribution, a fully developed Poiseuille flow has been subjected of study as to determine the effect of channel morphology combined with the electrostatic wall characteristics may have ultimately on the effective transport parameters of the system.

After the analysis of the electrohydrodynamics of the system has been determined, the molar species continuity equation is used to analyze the solute dispersion in the channel. Asymmetrical boundary conditions have been imposed over the system to capture the most representative behavior of the fluid. Several numerical examples illustrate the hydrodynamic and dispersion trends of the system using channel axial deformation, Debye Length, Electrostatic Potential ratio as possible design factors, for example.