Enhancement of the vorticity based on side feeding in a microdevice

A new strategy to stimulate vorticity by chaotic advection in microchannels has been investigated. In a microfluidic pattern study, the enhancement of the vorticity still represents a burden for many researchers. The reason is that diffusion transport prevails over the convective forces in laminar regimes, contributing to a no chaotic flow performance. Most of the Computational Fluid Dynamics (CFD) analyses investigate the influence of grooving and obstacles to enhance mixing. This study investigates the formation of vortices in a flow by varying the geometry of an entrance chamber using CFD. The principles applied in the design of cyclones are considered. The narrowing of the microchannel has contributed considerably to create vortices. Likewise, the flattening of the bumps has provided a slight increment in both the vorticity field and the pressure gradient. Lastly, the lateral feeding in the conical chamber has created zones of recirculation. The numerical findings provide evidence that the side feeding in a conical chamber enhances the vorticity.

Automated summary

A new strategy to stimulate vorticity by chaotic advection in microchannels has been investigated, and it was found that the narrowing of the microchannel, flattening of the bumps, and lateral feeding in the conical chamber can enhance vorticity.