This research paper presents a numerical investigation of the growth of chimney plume dispersion characteristics under crosswind conditions. Chimney is commonly used to disperse pollutants and heat from industrial processes and crosswind conditions can significantly affect their growth and dispersion. The study uses a computational fluid dynamics (CFD) approach to simulate the plume dispersion with 4 different plume velocities and wind velocity combinations. A cylindrical chimney model with an internal diameter of 10 mm is used for the simulation. The results show that the crosswind conditions significantly impact the plume’s growth and dispersion. Higher crosswind speeds in perpendicular directions result in downwash characteristics and increase the possibility of pollutants reaching the ground at a shorter distance from the chimney location. The study provides insights into the impact of crosswind conditions on chimney plume growth and can be used to inform the design and operation of industrial processes using chimney plumes for pollution and heat dispersion.