A parametric computational study was conducted on UWS (urea-water-solution) droplets evaporating at conditions typical of an automobile SCR (selective catalytic reduction) system. The computational model used in the present work has been validated earlier using experimental data and was found capable of predicting the evaporation behaviour of UWS droplets. The ambient temperatures considered in the present study ranged from 423 K to 873 K and the free-stream gas velocities used were between 1 m/s and 100 m/s. The droplets were injected perpendicular to the free-stream and the droplet diameter, as well as its position, was tracked with time. The initial diameters of the droplets investigated ranged between 10 and 200 microns. A rapid mixing (RM) model was employed for the liquid phase in order to reduce the computational costs and the droplet evaporation model was based on the vaporization model proposed by Abramzon and Sirignano. The effect of the ambient gas, on the vaporization rate of the droplet, was also investigated in the present work. The governing equations, used in the computational model, were solved numerically using MATLAB and the results on the vaporization behaviour of the UWS droplets are presented. © 2021 ICLASS 2021 - 15th Triennial International Conference on Liquid Atomization and Spray Systems. All Rights Reserved.