Wicking in a powder

P. S. Raux; H. Cockenpot; M. Ramaioli; D. Quéré; C. Clanet

doi:10.1021/la400015v

Wicking in a powder

P. S. Raux, H. Cockenpot, M. Ramaioli, D. Quéré, C. Clanet

Research output: Contribution to journal › Article › peer-review

Abstract

We investigate the wicking in granular media by considering layers of grains at the surface of a liquid and discuss the critical contact angle below which spontaneous impregnation takes place. This angle is found to be on the order of 55° for monodisperse layers, significantly smaller than 90°, the threshold value for penetrating assemblies of tubes. Owing to geometry, impregnating grains is more demanding than impregnating tubes. We also consider the additional effects of polydispersity and pressure on this wetting transition and discuss the corresponding shift observed for the critical contact angle.

Original language	English
Pages (from-to)	3636-3644
Number of pages	9
Journal	Langmuir
Volume	29
Issue number	11
DOIs	https://doi.org/10.1021/la400015v
Publication status	Published - 19 Mar 2013

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title = "Wicking in a powder",

abstract = "We investigate the wicking in granular media by considering layers of grains at the surface of a liquid and discuss the critical contact angle below which spontaneous impregnation takes place. This angle is found to be on the order of 55° for monodisperse layers, significantly smaller than 90°, the threshold value for penetrating assemblies of tubes. Owing to geometry, impregnating grains is more demanding than impregnating tubes. We also consider the additional effects of polydispersity and pressure on this wetting transition and discuss the corresponding shift observed for the critical contact angle.",

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AU - Raux, P. S.

AU - Cockenpot, H.

AU - Ramaioli, M.

AU - Quéré, D.

AU - Clanet, C.

PY - 2013/3/19

Y1 - 2013/3/19

N2 - We investigate the wicking in granular media by considering layers of grains at the surface of a liquid and discuss the critical contact angle below which spontaneous impregnation takes place. This angle is found to be on the order of 55° for monodisperse layers, significantly smaller than 90°, the threshold value for penetrating assemblies of tubes. Owing to geometry, impregnating grains is more demanding than impregnating tubes. We also consider the additional effects of polydispersity and pressure on this wetting transition and discuss the corresponding shift observed for the critical contact angle.

AB - We investigate the wicking in granular media by considering layers of grains at the surface of a liquid and discuss the critical contact angle below which spontaneous impregnation takes place. This angle is found to be on the order of 55° for monodisperse layers, significantly smaller than 90°, the threshold value for penetrating assemblies of tubes. Owing to geometry, impregnating grains is more demanding than impregnating tubes. We also consider the additional effects of polydispersity and pressure on this wetting transition and discuss the corresponding shift observed for the critical contact angle.

U2 - 10.1021/la400015v

DO - 10.1021/la400015v

M3 - Article

C2 - 23438013

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SN - 0743-7463

VL - 29

SP - 3636

EP - 3644

JO - Langmuir

JF - Langmuir

IS - 11

ER -

Wicking in a powder

Abstract

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