This was not available in the print document as it is an interactive resource. Using R it is possible to show the node position in 3D from one of the models used for the CFD simulations interactively. Each point represents 1 node. One can Zoom in / out and rotate.
Notice the more densely populated volume around corresponding to the volume of fluid in the rotating volume element in the simulation. A more refined mesh was created there to resolve the impeller area more clearly.
Please to be able to visualize correctly use Firefox ™ or Chrome ™
Other geometries will be posted further on.