In the following tutorial, there will be shown the methodology of simulating and evaluating radial (centrifugal) fan using Turbomachinery CFD. This tutorial deals with centrifugal fan, the wheel diameter , total pressure difference . The compressible fluid flow model. The fan has no housing. The computational geometry of this fan case is depicted in Figure (). In this particular case the whole wheel is computed, nevertheless the single blade periodic case is possible. In the periodic case the approach would be almost the same.