The mixing and flow characteristics are numerically investigated for an electroosmotic flow through a heterogeneous charged micromixer with obstacles both at the top and bottom walls arranged in inline and staggered order by varying the obstruction angle (θ). The results are presented by varying the Debye parameter (κ), magnitude of the zeta potential (|ζ|), and obstruction angle in the range of 10 ≤ κ ≤ 100, 1 ≤|ζ| ≤ 4, and 60° ≤ θ ≤ 120°, respectively. Results reveal that the strength of the recirculation zone is the highest for θ = 90° and it enhances with κ and |ζ|, and moreover, the strength is always higher for the staggered arrangement of obstacles as compared to the inline order. For inline arrangement of the obstacles, the value of mixing efficiency (ME) decreases with κ as well as |ζ| and the highest values are seen for θ = 90°. For the staggered arrangement of obstacles, the variation of ME with κ is not monotonic; rather, it strongly depends on |ζ| and θ. The flow rate increases with the increase in κ and it is the lowest for θ = 90° and importantly, the flow rate is always more for inline arrangements of the obstacles.

通过改变阻塞角 ( θ ) ，在顶壁和底壁均设置有障碍物的带电微混合器的电渗流以串联和交错的顺序排列，对电渗流的混合和流动特性进行了数值研究。通过在 10 ≤ κ  ≤ 100, 1 ≤|的范围内改变德拜参数 ( κ )、zeta 电位的大小 (| ζ |) 和障碍角 来呈现结果。ζ | ≤ 4 和 60° ≤  θ  ≤ 120°，分别。结果表明，再循环区的强度在θ  = 90° 时最高，并且随着κ和 | 的增加而增强。ζ|，而且，与内联顺序相比，障碍物交错排列的强度总是更高。对于障碍物的内联布置，混合效率（ME）的值随着κ以及| 的减小而减小。ζ | 最高值出现在θ  = 90° 时。对于障碍物的交错排列，ME随κ的变化不是单调的；相反，它强烈依赖于 | ζ | 和θ。流量随着κ 的增加而增加，并且在θ =  90° 时最低，重要的是，对于障碍物的内联布置，流量总是更多。