Gaseous exhaust of different industries contains harmful particles such as dust or soot (unburned carbon) that can be dangerous for the environment. Electrostatic precipitators are used in industries to remove such harmful particles before its release into the atmosphere. Electrostatic precipitators are designed to remove more than 99% of the particles from the exhaust gases but there are many factors that can reduce the efficiency of an Electrostatic precipitator such as particle size distribution, velocity distribution, temperature skewness etc. This thesis evaluates the influcence of flow devices on temperature, flow, and particle distribution in an Electrostatic precipitator using computational fluid dynamics software Ansys CFX. With the introduction of well-designed and optimized flow devices, the temperature, flow, and particle distribution show a desired change and can hence positively influence the performance on an Electrostatic Precipitator.