Feedforward Control and Simulation of Laminar Flow Interface in Microfluidic Channel

The laminar flow allows each fluid to simultaneously maintain its own flow pattern while only reacting or diffusing at the contact interface of adjacent streams when two or more different fluids flow into the microfluidic channel. It has been widely used in cell patterning, solvent extraction, organic synthesis, microfabrication and other fields. In this paper, a feedforward control scheme (Iterative Learning Control) is proposed to precisely control for interface position of laminar flow in the Y-shaped microfluidic chip. To verify the control efficacy, fluid simulation is adopted to realize the control process. The results show that the system can effectively track the desired output.