Performance Investigation of T-Shaped Micromixer with Different Obstacles

Mixing of fluids is an essential process of most of the microfluidic systems. Usually, passive micromixers are employed for this purpose. In the case of creeping or flow having low Reynolds number, the mixing process is dominated by diffusion and shows lower mixing efficiency with higher mixing length. To enhance the mixing efficiency and decrease the mixing length, T-micromixers are analyzed in the present work with different types of obstacles. Here, the effect of a single obstacle with different shapes and positions in T-micromixer is analyzed. Basic shapes such as circle, ellipse, triangle, and rhombus (diamond) are used for the obstacle. To define at par dimensions, all selected shapes for the obstacle are inscribed through a common circle. The flow simulations are created in multiphysics software COMSOL. The best obstacle is selected based on mixing efficiency and mixing length. The obtained results will be helpful to design micromixers with high performance.