Computational Fluids Dynamics is the engineering science of studying how a medium such as air flows through a structure and examines its physical properties. The movement of air around the components of a fan such as the impeller can be investigated to reduce regions of turbulence and eddy flows. Understanding the local properties of the flow enhances the knowledge of our fans under operation in a greater detail. we have engaged in the research of new fan designs based on CFD. We have also involves ourselves in graph visualisation and data processing to present the fan performance with clarity.