University of Cincinnati

Ali Asgar S Bhagat

Ian Papautsky

A spiral microchannel particle separator includes an inlet for receiving a solution containing particles, at least two outlets, and a microchannel arranged in a plurality of loops. Particles within a solution flowing through the spiral microchannel experience a lift force Fand a Dean drag force F. The spiral radius of curvature R and the hydraulic diameter Dof the spiral microchannel are such that for a flow rate U of the solution, the lift force Fand a Dean drag force Fare approximately equal and act in opposite directions for particles of a first size. The particles of the first size are focused in a single stream located at an equilibrium position near an inner wall of the microchannel. In another embodiment, a straight microchannel particle separator separates particles by modulating shear rates via high aspect ratios that focuses particles of a first size along two first walls.

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Cincinnati, OH, United States of America

Ali Asgar S Bhagat