Particles which are initially distributed uniformly in a film rimming a rotating cylinder will be drawn into bands. The fluid used here is a solution of ZnCl2, Triton X100 and water. In the following example, the rotational speed is three rpm and the formation of the bands takes hours.

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Process of particle bands formation. The experiment is performed with high viscous Triton mixture fluid under low rotating speed and low filling level.

Process of particle bands formation. The experiment is performed with low viscous Triton mixture fluid under relatively high rotating speed and low filling level.