LAUSR

Abstract 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.