Patterning flows using grooved surfaces

摘要: Through a simple analytical description we quantify how pressure-driven flows over grooved surfaces develop transverse components, which, for shallow grooves, can be modeled with anisotropic effective boundary conditions. Helical recirculation results in channels or capillaries walls. An experimental validation of our model is presented. Our analysis provides workable guide the design 3D patterns regions, e.g., to control position streams cross section channel promote mixing. Potential applications microfluidics are outlined.