COMSOL Simulation of Bio-MEMS Rotating Microfluidic Mixer

Microfluidic flows in MEMS devices are generally laminar flows, hence the mixing is difficult. To improve the mixing of microfluidic flows, a passive or active micromixer device is needed. In this poster, the design and simulation of a Bio-MEMS rotating microfluidic mixer is proposed. The micromixer takes three input flows and generates one output flow. A rotating blade is used to stir the microfluid inside the mixer to introduce extra turbulence, hence resulting in better mixing outcome. Compared to passive micromixer, the proposed active rotating micromixer leads to better mixing efficiency. The microfluidic mixer is designed and simulated in COMSOL. COMSOL simulation reveals the mixing mechanism of the microfluid flows. Based on the analysis, a set of optimized design parameters of the micromixer is achieved. The proposed micromixer can be used for micro drug delivery system, lab-on-a-chip and other biomedical applications