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应用统一的格子-Boltzmann模型对微尺度平板均匀通道、壁面粗糙元通道、壁面非均匀非对称电势分布以及壁面非均匀对称电势分布四类通道中电渗驱动流的外加电场分布、溶液电势分布、流场以及混合物浓度在同一框架内进行了数值模拟.数值分析表明:与平板均匀通道相比,三类强化通道都能在一定程度上强化电渗混合,但是由于流动阻力增加,混合时间的延长对混合强化的作用不可忽略。所研究的三类强化通道中,壁面布置粗糙元通道能够在增加混合时间较小的前提下,获得较高的混合强度。
The uniform lattice-Boltzmann model is applied to analyze the electric field distribution, solution potential distribution, electric field distribution and electric field of the electroosmotic driving flow in the four channels of micro-scale flat uniform channel, rough channel of wall, asymmetric non-uniform wall potential and non- Flow field and concentration of mixture in the same framework were numerically simulated.The numerical analysis showed that compared with the uniform channel, all three types of enhanced channels can enhance the electroosmotic mixing to a certain extent, but due to the increase of flow resistance, the mixing time is prolonged The role of mixing and strengthening can not be ignored. Among the three kinds of reinforced channels studied, the roughened channel arranged on the wall can achieve higher mixing strength under the condition of increasing the mixing time.