A review of the literature on the atomization of high viscosity fluids is provided. The review starts with a brief presentation of various atomization models, which are used to predict the spray droplet sizes. Next, atomization results using different types of atomizers are reviewed. These include plain orifice, splash plate, swirl, and twin-fluid atomizers. Generally, most studies show that the Sauter Mean Diameter of a spray (SMD) increases with viscosity. This increase can be compensated by increasing the energy input to the atomizer (such as increasing the...