Instabilities and elastic recoil of the two-fluid circular hydraulic jump. Hsu, T. T, Walker, T. W, Frank, C. W, & Fuller, G. G Experiments in Fluids, 55(1):1645, 2014.
Instabilities and elastic recoil of the two-fluid circular hydraulic jump [link]Paper  doi  abstract   bibtex   
The two-fluid circular hydraulic jump, also called "rinsing flow," is a common process where a jet of one liquid impinges upon a layer of a second liquid. We present an experimental analysis of rinsing flows using a high-speed camera and model fluids to decouple the effect of shear-thinning and elasticity. Varying the rheology of the coating fluid produced several types of instabilities at both the air-liquid interface and liquid-liquid interface. Layered "stepped jumps" and "crowning" on the rim of the jumps were both suppressed by fluid elasticity, while Saffman-Taylor fingering patterns showed strong dependence on both shear-thinning and normal stresses. In addition, the hydraulic jump evolution was quantitatively determined using a laser triangulation technique, and "recoil" of the jump front resulting from fluid elasticity was observed. Our work shows that the non-Newtonian two-fluid circular hydraulic jump is very complex, and the instabilities that arise also introduce additional complications when developing theoretical models. textcopyright Springer-Verlag Berlin Heidelberg 2013.
@article{hsu_instabilities_2014,
	Abstract = {The two-fluid circular hydraulic jump, also called "rinsing flow," is a common process where a jet of one liquid impinges upon a layer of a second liquid. We present an experimental analysis of rinsing flows using a high-speed camera and model fluids to decouple the effect of shear-thinning and elasticity. Varying the rheology of the coating fluid produced several types of instabilities at both the air-liquid interface and liquid-liquid interface. Layered "stepped jumps" and "crowning" on the rim of the jumps were both suppressed by fluid elasticity, while Saffman-Taylor fingering patterns showed strong dependence on both shear-thinning and normal stresses. In addition, the hydraulic jump evolution was quantitatively determined using a laser triangulation technique, and "recoil" of the jump front resulting from fluid elasticity was observed. Our work shows that the non-Newtonian two-fluid circular hydraulic jump is very complex, and the instabilities that arise also introduce additional complications when developing theoretical models. textcopyright Springer-Verlag Berlin Heidelberg 2013.},
	Author = {Hsu, Tienyi T and Walker, Travis W and Frank, Curtis W and Fuller, Gerald G},
	Doi = {10.1007/s00348-013-1645-9},
	Journal = {Experiments in Fluids},
	Number = {1},
	Pages = {1645},
	Title = {Instabilities and elastic recoil of the two-fluid circular hydraulic jump},
	Url = {http://link.springer.com/10.1007/s00348-013-1645-9},
	Volume = {55},
	Year = {2014},
	Bdsk-Url-1 = {http://link.springer.com/10.1007/s00348-013-1645-9},
	Bdsk-Url-2 = {http://dx.doi.org/10.1007/s00348-013-1645-9}}

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