Session C1The last few decades have witnessed the increasing interest in the electroosmotic flow due to its
widely applications (H.C. Chang, L.Y. Yeo (2010)). Most existing works are limited to the
problems with constant slip boundaries or Newtonian fluid flow. No works have been done to the
combined effect of variable hydrodynamic slip and fluid rheological behaviour on the electrokinetic
flow. In the paper, the power-law electroosmotic flow in microchannels with variable boundary slip
conditions is numerical simulated by the lattice Boltzmann method (Z.H. Chai, T.S. Zhao (2012)),
how the Debye length, the power law index, the slip distributions on the channel boundaries affect
the fluid flow involved is studied. The following conclusions can be obtained: (1) The slip
contributes more to the flow flux when the power law index increases or the Debye length
decreases in the variable boundaries slip cases (Fig. 1(a)); (2) The larger boundary slip area on the
boundaries means larger flow flux, the larger power law index leads to the smaller flow flux
compared with the constant boundary slip cases (Fig.1(b)); In the meantime, the flow flux
difference between cases with different boundary slip areas seems larger when the index increases;
(3) the larger boundary slip oscillation frequency leads to the smaller the flow flux. The effect of
the frequency is more apparent when the power law index increases.published_or_final_versio
