Development of micromixer for efficient mixing of blood and insulin in human arteries

In the present work, the computational analysis of passive micromixer with embedded obstacles is studied in detail. It also focuses on Y shaped microchannel with internal embedded obstacles. Different types of Y shaped microchannels are designed by altering the cross section, mixing length and number of obstacles. For simplicity, same velocities at both blood and insulin inlets are assumed. Microchannels are designed in CATIA V5 software and simulations were performed using ANSYS CFX 19.0 solver for steady state condition. Identification of geometric variables correlation with flow field variables is considered for better mixing design. Simulation results are compared with the help of calculating volume fraction at each section and average volume fraction at outlet with each other. It is found that, microchannel having rectangular cross section with circular and rectangular obstacles with reduced length for insulin inlet is giving highest average volume fraction at outlet. Also, one with elliptical cross section is able to give uniform average volume fraction at outlet. By observing mixing profile, it is seen that there is significant increase in mixing behaviour by introducing embedded obstacles as compared to without using it.