The two-dimensional wake gas flows behind a flat plate, loaded with solid particles of the Stokes number 0.15 and 1.4, are simulated through the vortex method proposed by the authors in a prior study. The simulated particle distribution is confirmed to agree with the experimentally visualized result. The simulation clarifies that the loaded particles make the gas mean velocity gradient in the wake crosssection gentler and that the gas turbulent intensity reduces by the particle except near the wake centerline. (C) 2004 Elsevier B.V. All rights reserved.