Numerical Study of Flow Through a Reducer for Scale Growth Suppression presents a numerical study using the finite volume method to analyze the fluid dynamics behavior of water as it flows through a concentric reducer. The simulation results show a significant variation of the stream-wise and cross-stream component of the fluctuating velocity as flow passes through the concentric reducer. The variation of the cross-stream component of the fluctuating velocity is believed to be accountable for the increase in scale deposition at the reducer section.