British Society of Rheology Mid-Winter Meeting 2018, Edinburgh

British Society of Rheology Mid-Winter Meeting 2018, Edinburgh

In December Shiwani and I attended the British Society of Rheology Mid-Winter Meeting in Edinburgh. We both gave talks about the work we have been doing to model elastic turbulence.

The meeting covered a wide variety of topics related to rheology including the behaviour of fibres and droplets in flows, the rheology of particle and bacterial suspensions, viscoplastic motion, the dynamics of foams and 3D printing. The presenations included results from theory, computational modelling and experiments. The meeting opened my eyes to the many different applications rheological research has.

A fluid behaviour that I had not seen before was described by Jack King from the University of Manchester. First reported by A. Kaye in Nature in 1963, the Kaye effect occurs when a thin stream of shampoo is poured onto a surface. At first there is  heap of shampoo and then suddenly some of the shampoo with jet out to the side of the heap and rise up before falling back down, see the video. The jet is a result of the fluid being shear-thinning, the viscosity of the fluid decreases when it is sheared. King has been conducting some experiments and simulations to investigate this effect and found that it did not occur in a vacuum implying that the surrounding air is playing a role in the Kaye effect.

Before trying this at home, note that this effect is not observed for all types of shampoo, so you may need to try a few before you see the effect.