In the present study, an improved Incompressible Smoothed Particle Hydrodynamics algorithm (ISPH) is proposed to model the mixing flow in an active micromixer in which an oscillating cylinder cusses to enhance the mixing rate. The mass transport is investigated for the case that the inlet fluids can have different viscosities. First, the numerical procedure is explained. Then it is validated against analytical results and other numerical results. Last, the main problem is modeled and investigated. For the channel, the entering fluids have different concentration and viscosity. The effect of viscosity differences is investigated for different Forced-Strouhal and Reynolds numbers. The results show that these two non-dimensional parameters have an essential role in the behavior of the cases with different viscosity. The present results also indicate that the viscosity differences have major effects on the mixing rate.

在本研究中，提出了一种改进的不可压缩的光滑粒子流体动力学算法（ISPH），以对主动微混合器中的混合流进行建模，在该混合器中，振动的圆柱体会急速运动以提高混合速率。对于进料流体可能具有不同粘度的情况，对传质进行了研究。首先，说明数值过程。然后根据分析结果和其他数值结果对其进行验证。最后，对主要问题进行建模和研究。对于通道，进入的流体具有不同的浓度和粘度。对于不同的强制斯特劳哈尔数和雷诺数，研究了粘度差异的影响。结果表明，这两个无量纲参数在具有不同粘度的情况下的行为中起着至关重要的作用。