Wall effects in microchannel-based macromolecular separation under electromagnetohydrodynamic influences

摘要

The present paper aims to develop a theoretical model to highlight the influences of the near-wall interaction potentials and the consequent migrative fluxes on the size-based separation of macromolecules in microchannels subject to combined electromagnetohydrodynamic influences. It is established that the speed of traverse and the extent of spreading (dispersion) of the macromolecular bands is effectively determined on the basis of the macromolecular size relative to the channel height and the extent of near-wall interactions. It is demonstrated that because of the near-wall effects, macromolecular pairs with less disparities in sizes give rise to higher values of resolution.