Large-scale microalgae farming takes place in a raceway pond, which is a long, shallow, closed-loop recirculation channel. The improper design of the raceway pond will result in the creation of a dead zone with very low velocity. Additionally, it results in uneven velocity across the entire pond, which has a negative effect on the development of algae. This study looked at the impact of five different aspect ratios (length/width) on raceway ponds such as 5, 10, 15, 20 and 25 with a constant depth of 0.4 m and inlet velocity of 0.3 m/s. Two distinct paddle wheel positions were used to reduce the dead zone. ANSYS-Fluent software is used for the simulation of the raceway pond in which k–ε turbulence closure equation is used to carry out the simulation. It examined the hydrodynamic performance of the raceway pond based on factors of velocity uniformity and eddy viscosity. The simulated results show higher velocity homogeneity for aspect ratios > 15 that indicating better geometry to be used for an efficient raceway pond. The study also found that the efficiency of the raceway pond is better when the paddle wheel is placed in the middle of the total length of the raceway pond.