Electroosmosis of a viscoelastic fluid over non-uniformly charged surfaces: Effect of fluid relaxation and retardation time

摘要: We investigate the electroosmotic flow of a quasi-linear viscoelastic fluid over surface having charge modulation in narrow confinements. obtain analytical solutions using combination regular and matched asymptotic expansions order to describe field apparent slip velocity besides pinpointing variations rate ionic currents due modulation. demonstrate excellent agreement between solution for full numerical limiting condition thin electrical double layer weakly fluid. For wide range governing parameters, we analyze velocity, vortex dynamics, rates, streaming current. that magnitude observed is more sensitive thickness rather than viscoelasticity have contribution elasticity prominent breaking axial symmetry with presence periodic distributions, which contrast symmetric Newtonian same modulated walls. The results hold key toward understanding biological fluids microfluidic flows by leveraging electrokinetic transport surfaces. believe net throughput, current, dynamics will aid our complex behavior mixers.