computational fluid dynamics used to run multiple iterations of volute design on 15000 RPM high output air compressor using computational fluid design. Design comparison was key - showed better designs in a few days without prototypes.

This kind of simulation needs quite powerful computer. As example the person who created this simulation has used a 32bit XP workstation with a dual core 3.2 GHz processor and 3 GB (using unofficial 3 GB windows switch) of RAM.

According to the comments of the youtube video this model has two problems.

1. This radial turbine is backwards dumping the fluid in the counter-clockwise direction and then it want it to travel in a clock-wise direction - the air is being pushed in the wrong direction
2.The fluid is turning that huge corner and you have separation. The fast moving fluid is due to all the back-pressure rather than steady flow.
This stator veins work because they redirect the air clockwise. Section-off this volute and flip this turbine.