In this study, the effect of Reynolds number on deposition in a flue gas turbine is numerically investigated by conducting a study on flow channels between stator blades and rotating blades. The turbulence flow is modeled by the Renormalization-group (RNG) k-epsilon model, and particle motions are simulated by the discrete particle model (DPM) with User Defined Function (UDF). Numerical investigation is conducted for particles in the size of d(p) < 10.78 mu m. These results show that inlet Reynolds number helps deposition develop except the pressure side of the stator blade. The pressure drop Delta p, temperature drop Delta T and velocity improvement Delta v increase with the increase of Re. Deposition morphologies on the blades are notably different depending on particle size. Smaller particles of d(p) < 3 mu m settle down on the blades at a 10 or even 10(9) times rate of larger particles. The main areas of deposition include the suction surface of stator blades, the pressure surface of rotating blades and the zone near the hub and casing on the suction surface of rotating blades. (C) 2018 Elsevier By. All rights reserved.