3. Radial Impeller Flow Calculation Available to Purchase

The flow in radial impellers is 3D, viscous, and unsteady. Unsteady 3D Navier–Stokes calculations require a very detailed geometry definition and considerable effort. The first Navier–Stokes steady flow calculations by Wallitt (1980) and Moore et al. (1983) nicely described the major flow phenomena such as secondary flows and suction side flow separation (Figure 3.1). However, excessive computational effort (6 weeks on a supercomputer for only 100 000 grid points in 1980) restricted their use to a final check of performance. The enormous increase in computational capacity and speed, and the improvement in the solvers, now allow a routine analysis of the 3D flow in impellers at design and off-design operation once the detailed geometry is defined.