Pressure-driven liquid flow with solid-liquid interfacial effects in microchannels is studied. In parallel-plate microchannels, the flow field effect on electric double layer (EDL) is presented. By measuring the electrical potential distribution along the channel and comparing them with those predicted by static EDL model, one may determine the flow field effect on EDL. A promising slip coating, Self-Assembled Monolayers (SAMs), for parallel-plate microchannels is also presented. The slip lengths of SAMs for liquid flow are experimentally determined. In a porous media channel, an electrical circuit model which follows the classical approach is presented. The electric potential and current are measured for pressure-driven flow in different pore sizes porous media with an external load. By realizing that streaming current is indeed additive, a new method to generate electricity is proposed by charge separation through direct conversion from the motion of a fluid (water) to electricity.
展开▼
