dorsal/arxiv
View SchemaLeaping shampoo and the stable Kaye effect
| Authors | Michel Versluis, Cor Blom, Devaraj van der Meer, Ko van der Weele, Detlef Lohse |
|---|---|
| Categories | |
| ArXiv ID | physics/0603183 |
| URL | https://arxiv.org/abs/physics/0603183 |
| DOI | 10.1088/1742-5468/2006/07/P07007 |
| Journal | J. Stat. Mech. (2006) P07007 |
Abstract
Shear-thinning fluids exhibit surprisingly rich behaviour. One example is the Kaye effect which occurs when a thin stream of a solution of polyisobutylene in Decalin is poured into a dish of the fluid. As pouring proceeds, a small stream of liquid occasionally leaps upward from the heap. This surprising effect, which lasts only a second or so, is named after its first observer A. Kaye, who could offer no explanation for this behaviour. Later, Collyer and Fischer suggested from 250 frames per second cine recordings that the fluid must be highly shear thinning as well as elastic and 'pituitous'. In addition, they concluded that a rigid surface is required to back the reflected liquid stream. While the words bouncing and reflection are associated with non-continuous and elastic effects, we will show here that the Kaye effect is in fact a continuous flow phenomenon. We show that the Kaye effect works for many common fluids, including shampoos and liquid soaps. We reveal its physical mechanism (formation, stability and disruption) through high-speed imaging. The measurements are interpreted with a simple theoretical model including only the shear thinning behaviour of the liquid; elastic properties of the liquid play no role. We show that the Kaye effect can be stable and that it can be directed. We even demonstrate a stable Kaye effect on a thin soap film excluding the necessity of a rigid backing surface.
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"abstract": "Shear-thinning fluids exhibit surprisingly rich behaviour. One example is the\nKaye effect which occurs when a thin stream of a solution of polyisobutylene in\nDecalin is poured into a dish of the fluid. As pouring proceeds, a small stream\nof liquid occasionally leaps upward from the heap. This surprising effect,\nwhich lasts only a second or so, is named after its first observer A. Kaye, who\ncould offer no explanation for this behaviour. Later, Collyer and Fischer\nsuggested from 250 frames per second cine recordings that the fluid must be\nhighly shear thinning as well as elastic and \u0027pituitous\u0027. In addition, they\nconcluded that a rigid surface is required to back the reflected liquid stream.\nWhile the words bouncing and reflection are associated with non-continuous and\nelastic effects, we will show here that the Kaye effect is in fact a continuous\nflow phenomenon. We show that the Kaye effect works for many common fluids,\nincluding shampoos and liquid soaps. We reveal its physical mechanism\n(formation, stability and disruption) through high-speed imaging. The\nmeasurements are interpreted with a simple theoretical model including only the\nshear thinning behaviour of the liquid; elastic properties of the liquid play\nno role. We show that the Kaye effect can be stable and that it can be\ndirected. We even demonstrate a stable Kaye effect on a thin soap film\nexcluding the necessity of a rigid backing surface.",
"arxiv_id": "physics/0603183",
"authors": [
"Michel Versluis",
"Cor Blom",
"Devaraj van der Meer",
"Ko van der Weele",
"Detlef Lohse"
],
"categories": [
"physics.flu-dyn"
],
"doi": "10.1088/1742-5468/2006/07/P07007",
"journal_ref": "J. Stat. Mech. (2006) P07007",
"title": "Leaping shampoo and the stable Kaye effect",
"url": "https://arxiv.org/abs/physics/0603183"
},
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