The flow structure and the temperature distribution in ventilated disk passage are investigated thoroughly in this work. Two computational methods are used, namely, the finite volume method (FVM) and finite element method (FEM). Both are based on the Navier-Stokes partial differential equations (PDEs) but with different algorithms and meshes. With different settings of operating conditions on disk, the following important parameters are considered: inlet Reynolds number (Re), rotational speed, shroud clearance, and wall temperature. Both corotating and counterrotating disks also are being studied. The former is based on FORTRAN code and the later on a FASTFLO partial differential equation (PDE) calculator. Both codes are run on an SGI UNIX workstation. It is found that both the Corolis force and centrifugal buoyancy have important effects on the flow structure and heat transfer because of the rotational speed and inlet velocity. The Nusselt number (Nu) decreases along the radius, especially near the disk outer edge. It decreases more rapidly along the radius, and the absolute value is much greater for nonventilated disks. The predicted friction coefficient (Cf) also are very different in both cases. For the ventilated case, Cf varies rapidly, whereas in the nonventilated case, Cf is rather constant when rotational speed (Omega) is low (< 100 rpm). However, when Omega is higher (> 800 rpm), Cf varies appreciably along the radius. Finally, the shroud clearance has the pronounced effects only in the high-Re flow. The results are compared and discussed, and their agreement is good.