Rotation of melting ice disks due to melt fluid flow

Dorbolo, Stéphane; Adami, Nicolas; Dubois, Charles; Caps, Hervé; Vandewalle, Nicolas; Texier, Baptiste Darbois

doi:10.1103/physreve.93.033112

Cited by 14 publications

(9 citation statements)

References 8 publications

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“…The melt rates of the freshwater system agree well with independent laboratory measurements of Dorbolo et al . [] (black diamond). They measured the mass flux of a rotating ice disc melting in fresh water.…”

Section: Discussionsupporting

confidence: 89%

Reconciling estimates of the ratio of heat and salt fluxes at the ice-ocean interface

Keitzl

Mellado

Notz

2016

J. Geophys. Res. Oceans

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The heat exchange between floating ice and the underlying ocean is determined by the interplay of diffusive fluxes directly at the ice–ocean interface and turbulent fluxes away from it. In this study, we examine this interplay through direct numerical simulations of free convection. Our results show that an estimation of the interface flux ratio based on direct measurements of the turbulent fluxes can be difficult because the flux ratio varies with depth. As an alternative, we present a consistent evaluation of the flux ratio based on the total heat and salt fluxes across the boundary layer. This approach allows us to reconcile previous estimates of the ice–ocean interface conditions. We find that the ratio of heat and salt fluxes directly at the interface is 83–100 rather than 33 as determined by previous turbulence measurements in the outer layer. This can cause errors in the estimated ice‐ablation rate from field measurements of up to 40% if they are based on the three‐equation formulation.

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Section: Discussionsupporting

confidence: 89%

Reconciling estimates of the ratio of heat and salt fluxes at the ice-ocean interface

Keitzl

Mellado

Notz

2016

J. Geophys. Res. Oceans

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“…We related this phenomenon to the rotation of ice disc at the surface of a thermalised bath and the model we propose here is similar to what was developed in Ref. [4].…”

Section: Introductionmentioning

confidence: 66%

“…The origin of the phenomenon is shown to be analogous to the rotation of ice disk while melting at the surface of a thermalised bath. 19 A model based on the viscous drag applied to the ice disk by the melted water flow is proposed.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous rotation of an ice disk while melting on a solid plate

2016

Self Cite

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Ice disks were released at the surface of a thermalised aluminium plate. The fusion of the ice creates a lubrication film between the ice disk and the plate. The situation is similar to the Leidenfrost effect reported for a liquid droplet evaporating at the surface of a plate which temperature is above the boiling temperature of the liquid. An analogy is depicted between the Leidenfrost phenomenon and the rapid fusion of a solid at the contact of a hot plate. Similarly to Leidenfrost droplet, we observe that, while the ice disks were melting, the disks were very mobile: translation and rotation. A hole was drilled in the plate and allowed the canalising of the melted liquid. Under these conditions, we discover that the rotation of the ice disk is systematic and persistent. Moreover, the rotation speed increases with the temperature of the plate and with the load put on the ice disk. A model is proposed to explain the spontaneous rotation of the ice disk. We claim that the rotation is due to the viscous drag of the liquid that flows around the ice disk. Published by AIP Publishing.

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“…A circular ice disk melting at the surface of a water pool has also been observed to spin spontaneously. In this case, the driving mechanism totally differs from those considered above, being of purely hydrodynamic origin (22). Here, the cooling of the water at the base of the disk makes its density larger than that of the water located lower in the bath, generating a downward plume through the classical Rayleigh-Taylor mechanism.…”

Section: Graphical Abstractmentioning

confidence: 91%

Spontaneous spinning of a dichloromethane drop on an aqueous surfactant solution

Boniface¹,

Sebilleau²,

Magnaudet³

et al. 2022

Preprint

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We report a series of experiments carried out with a dichloromethane drop deposited on the surface of an aqueous solution containing a surfactant, cetyltrimethylammonium bromide. After an induction stage during which the drop stays axisymmetric, oscillations occur along the contact line. These oscillations are succeeded by a spectacular spontaneous spinning of the drop. The latter quickly takes the form of a two-tip 'rotor' and the spinning rate stabilizes at a constant value, no longer varying despite the gradual changes of the drop shape and size. The drop eventually disappears due to the continual dissolution and evaporation of dichloromethane.Schlieren visualizations and particle image velocimetry are used to establish a consistent scenario capable of explaining the evolution of the system. The Marangoni effect induced by the dissolution of dichloromethane in the drop vicinity is shown to be responsible for the observed dynamics. Arguments borrowed from dynamical systems theory and from an existing low-order model allow us to explain qualitatively why the system selects the spinning configuration. The geometry of the immersed part of the drop is shown to play a crucial role in this selection process, as well as in the regulation of the spinning rate.

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Rotation of melting ice disks due to melt fluid flow

Cited by 14 publications

References 8 publications

Reconciling estimates of the ratio of heat and salt fluxes at the ice-ocean interface

Reconciling estimates of the ratio of heat and salt fluxes at the ice-ocean interface

Spontaneous rotation of an ice disk while melting on a solid plate

Spontaneous spinning of a dichloromethane drop on an aqueous surfactant solution

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