Kaye effect

The Kaye effect is a property of pseudoplastic fluids and was first described in 1963 by British engineer Alan Kaye. The effect is not yet fully understood.

If you pour a pseudoplastic liquid on a surface, then sprayed a thin beam from the surface up and out. The effect is easy to observe with shampoo.

Description

The effect can be divided from the initiation to the termination in 3 stages. The effect is initiated by the discharge of a fluid loop of the entry point of the beam. This loop evolves into a stable output beam whose angle increases more and more to the horizontal. Meets the emerging jet the incoming beam, the effect ends. The effect is initially located on the emergence of a highly viscous heap with a top, the beam back throwing bowl bound. During the cycle, the pile slowly sinks into himself, because no material gets added. At the same time the trough, which deflects the beam so that the beam emerges steeper deepened.

The effect occurs only when shear-thinning ( pseudoplastic ) on liquids. While Kaye with a solution of polyisobutylene in decalin worked, were later investigations with liquid soap or shampoo Performed.

Versluis and colleagues ( see references ) showed that the effect occurs and stable even be cascaded, as the beam encounters a downwardly flowing liquid film on an inclined surface.