Electroosmotic flow in the vicinity of a conducting obstacle mounted on the surface of a wide microchannel

摘要: Abstract A numerical study is made on the electroosmotic flow (EOF) near a polarizable metallic obstacle mounted one of non-conducting walls microchannel. The external electric field induces Debye layer non-uniform ζ -potential along obstacle, which results in non-linear flow. combined effect surface roughness and double creates vortical form this its dependence bulk ionic concentration analyzed. Our model based computation Navier–Stokes, Nernst–Planck Poisson equations. We have computed governing coupled set equations by control volume method over staggered grid system. show that flow, develops vicinity depends thickness homogeneous part channel. free-slip model, zero charge density region found to over-predict result present model. However, approaches when considered be sufficiently strong.