Numerical Study of a Novel Micromixer with Obstructions

Micromixer is a principal part in microfluidic systems which deal with more than one fluid. Because of the low Reynolds number nature of the fluid flow within the microchannels, it is important to improve the quality of mixing by utilizing novel methods. Passive structures have been widely used in micromixers, because of their high efficiency, uncomplicated design, and easy fabrication. In this paper, a novel obstruction unit was proposed and efficiency of the micromixer was studied by using FEM-based software COMSOL 5.1. The numerical results demonstrate a significant improvement in comparison to the efficiency of the straight micromixers. This novel obstruction unit can be used in bio-applications in order to improve the mixing efficiency.