Fluid flow in the microchannel is limited to the low Reynolds number regime.As a result,mixing of solutions with different concentrations in the microchannel is inherently diffusion dominated,requiring a long mixing c...Fluid flow in the microchannel is limited to the low Reynolds number regime.As a result,mixing of solutions with different concentrations in the microchannel is inherently diffusion dominated,requiring a long mixing channel and retention time to attain a homogeneous solution.In this paper the flow characteristics in the two-dimension closed-end microchannel electroosmotic flow were simulated,and the mixing efficiencies of the closed-end microchannel electroosmotic flow applying different electric field intensities were compared.The results showed that because of existing non-uniform induced back pressure,there were two annular flows in the whole closed-end microchannel,enhancing the convection effect and leading to a shorter mixing time and higher mixing efficiency.展开更多
文摘Fluid flow in the microchannel is limited to the low Reynolds number regime.As a result,mixing of solutions with different concentrations in the microchannel is inherently diffusion dominated,requiring a long mixing channel and retention time to attain a homogeneous solution.In this paper the flow characteristics in the two-dimension closed-end microchannel electroosmotic flow were simulated,and the mixing efficiencies of the closed-end microchannel electroosmotic flow applying different electric field intensities were compared.The results showed that because of existing non-uniform induced back pressure,there were two annular flows in the whole closed-end microchannel,enhancing the convection effect and leading to a shorter mixing time and higher mixing efficiency.
