Geometric pumping in autophoretic channels

摘要: Many microfluidic devices use macroscopic pressure differentials to overcome viscous friction and generate flows in microchannels. In this work, we investigate how the chemical geometric properties of channel walls can drive a net flow by exploiting autophoretic slip induced along active local concentration gradients solute species. We show that patterning wall is not required control flux within channel, rather geometry alone sufficient. Using numerical simulations, determine characteristics influence rate, confirm our results analytically asymptotic limit lubrication theory.