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Keywords
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ISPH, micromixer, cross-shaped stirrer, straight stirrer, active mixer
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Abstract
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In the present study, we apply a robust Incompressible Smoothed Particle Hydrodynamics method
improved by advanced second-order discretization in order to examine active micromixers equipped with a rotating
or an oscillating stir-bar. Since it has a Lagrangian nature and it is based on particles, Smoothed Particle
Hydrodynamics is an appropriate and convenient method for the moving boundary and for one-way coupled fluid–
solid interactions. However, this method has not been applied to simulate active micromixers. The present study thus
introduces a convenient Smoothed Particle Hydrodynamics method for modelling active micromixers. In addition,
mixing flow is investigated by considering the vorticity field. Cross-shaped and straight stir-bars are also examined
and evaluated. The presented results show that the cross-shaped stir-bar is more efficient than the straight stir-bar. In
addition, the rotating cross-shaped stir-bar can be introduced as an appropriate stirrer, while the rotating straight stirbar
demonstrates weak performance.
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