Enhanced passive micromixing via asymmetric height-variable micropillar arrays at low Reynolds numbers

Key Points

• This research aims to improve passive mixing in microchannels using height-variable micropillar arrays at low Reynolds numbers.
• Utilized height-variable asymmetric micropillar arrays to facilitate passive mixing.
• Conducted experiments and simulations to evaluate mixing performance based on efficiency and enhancement ratios.
• Analyzed mixing dynamics in compact microchannels without external actuation.
• Achieved near-complete mixing efficiencies without the need for external devices.
• Demonstrated significant enhancement in transverse transport and interface stretching due to asymmetric designs.
• Validated geometry-driven strategies for process intensification in micromixing applications.