Leaping shampoo glides on a lubricating air layer

Lee, Sanghyun; Li, Erqiang; Marston, Jeremy; Bonito, Andrea; Thoroddsen, Sigurður T.

doi:10.1103/physreve.87.061001

Cited by 9 publications

(13 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It would be of interest to apply interferometry to thin air layers which have been observed to arise in many other dynamical systems. One recent example is the air film under a leaping shampoo jet (Lee et al 2013), where the shear and surfactants stabilize the layer, which is approximately 500 nm, estimated from bubble volumes.…”

Section: Future Directionsmentioning

confidence: 99%

Antibubbles and fine cylindrical sheets of air

Beilharz

Guyon

et al. 2015

J. Fluid Mech.

View full text Add to dashboard Cite

Drops impacting at low velocities onto a pool surface can stretch out thin hemispherical sheets of air between the drop and the pool. These air sheets can remain intact until they reach submicron thicknesses, at which point they rupture to form a myriad of microbubbles. By impacting a higher-viscosity drop onto a lower-viscosity pool, we have explored new geometries of such air films. In this way we are able to maintain stable air layers which can wrap around the entire drop to form repeatable antibubbles, i.e. spherical air layers bounded by inner and outer liquid masses. Furthermore, for the most viscous drops they enter the pool trailing a viscous thread reaching all the way to the pinch-off nozzle. The air sheet can also wrap around this thread and remain stable over an extended period of time to form a cylindrical air sheet. We study the parameter regime where these structures appear and their subsequent breakup. The stability of these thin cylindrical air sheets is inconsistent with inviscid stability theory, suggesting stabilization by lubrication forces within the submicron air layer. We use interferometry to measure the air-layer thickness versus depth along the cylindrical air sheet and around the drop. The air film is thickest above the equator of the drop, but thinner below the drop and up along the air cylinder. Based on microbubble volumes, the thickness of the cylindrical air layer becomes less than 100 nm before it ruptures.

show abstract

Section: Future Directionsmentioning

confidence: 99%

Antibubbles and fine cylindrical sheets of air

Beilharz

Guyon

et al. 2015

J. Fluid Mech.

View full text Add to dashboard Cite

show abstract

“…It was observed unambiguously in Lee et al [25] that the jet slides on a lubricating air layer. In order to reproduce qualitatively the above experiments we consider the two-dimensional computational domain Λ = (0.496 m, 0.594 m)×(0, 0.016 m).…”

Section: Kaye Effectmentioning

confidence: 84%

“…The experiments reported in Thrasher et al [31], Binder and Landig [5], Lee et al [25] suggest that a critical feature of bouncing jets is the occurrence of a thin layer between the jet and the rest of the fluid. These observations have led us to adopt a mesh refinement technique to describe accurately this thin layer.…”

Section: Adaptive Mesh Refinementmentioning

confidence: 99%

“…As a benchmark, we consider a commercial shampoo for which the shearthinning constants corresponding to the above model (53) have been identified experimentally in Lee et al [25]. Recall that viscosities cannot be measured directly but are deduced from velocity and displacement measurements so as to …”

Section: Kaye Effectmentioning

confidence: 99%

“…It is argued in Versluis et al [34] that elastic properties are not necessary and that the thin layer is a shear layer, whereas it is argued in Binder and Landig [5] that the fluid should have elastic properties and that the thin layer separating the heap from the bouncing jet is a layer of air. Recent experiments reported in Lee et al [25] using a high speed camera unambiguously show that the jet slides on a lubricating layer of air. For completeness, we also refer to Ochoa et al [27] for a thorough discussion on the "stable" Kaye effect, where the jet falls against an inclined surface.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical simulations of bouncing jets

Bonito

Guermond

Lee

2015

Numerical Methods in Fluids

View full text Add to dashboard Cite

Bouncing jets are fascinating phenomenons occurring under certain conditions when a jet impinges on a free surface. This effect is observed when the fluid is Newtonian and the jet falls in a bath undergoing a solid motion. It occurs also for non-Newtonian fluids when the jets falls in a vessel at rest containing the same fluid. We investigate numerically the impact of the experimental setting and the rheological properties of the fluid on the onset of the bouncing phenomenon. Our investigations show that the occurrence of a thin lubricating layer of air separating the jet and the rest of the liquid is a key factor for the bouncing of the jet to happen. The numerical technique that is used consists of a projection method for the Navier-Stokes system coupled with a level set formulation for the representation of the interface. The space approximation is done with adaptive finite elements. Adaptive refinement is shown to be very important to capture the thin layer of air that is responsible for the bouncing.

show abstract

The Kaye effect: New experiments and a mechanistic explanation

King

Lind

2019

Journal of Non-Newtonian Fluid Mechanics

View full text Add to dashboard Cite

Leaping shampoo glides on a lubricating air layer

Cited by 9 publications

References 10 publications

Antibubbles and fine cylindrical sheets of air

Antibubbles and fine cylindrical sheets of air

Numerical simulations of bouncing jets

The Kaye effect: New experiments and a mechanistic explanation

Contact Info

Product

Resources

About