This paper presents the numerical predictions of the fluid and heal transfer characteristics for the turbulent channel flow with one and two obstacles. The turbulent governing equations are solved by a control-volume-based finite-difference method with nan-uniform staggered grids and the well-known k-epsilon model and its associated wall function to describe the turbulence structure. The velocity and pressure terms of momentum equations are solved by the SIMPLE method. The parameters interested include entrance Reynolds number (between 10(4) and 10(6)), the ratio of channel height to obstacle height (B/H) and the dimensionless distance between two obstacles (PR). Computations are carried out for three working mediums, air, water and Freon R-12. The predicted attachment point located at x/H = 12.24 are compared with the experimental results of x/H = 12.3 for the unheated single Obstacle case with B/H = 15. The predicted heat transfer around the attachment point is much better than that in the recirculation region due to the strong impact at the attachment point.