Lechler GmbH in cooperation with Munich University worked in collaboration with Germany to conduct a cleaning evaluation tank test between static spray and rotational spray. The test results were presented a the World Brewing Congress in 2016.
The initial test was setup in a pilot brewery using 2 fermentation and storage tanks. Each tank was filled with the same beer and the fermentation and storage time were the same. Above the filling level there was a sticky yeast residue on the tank surface., which you can see inside the perimeter of each tank.
The image below shows tank 1, a static spray nozzle was used as the cleaning mechanism and in tank 2, Lechler's XactClean HP rotational nozzle was used.