This project aims to understand and model the complicated gas-solid flow and dust collection in an ElectroStatic Precipitator (ESP). It will be acheived by mean of advanced computational approaches at different time and length scales through a combined theoretical and experimental program. Project completion will significantly promote the capability of simulating gas-solid flow in compex systems. The outcomes can lead to better design and control of ESP systems which are widely used in many industries such as power generation and mineral/chemical processing