Properties of pendular liquid bridges determined on Delaunay’s roulettes
1 LaSIE, UMR-CNRS 7356, University of La Rochelle, 17042 La Rochelle Cedex 1, France.
2 LMGC UMR CNRS 5508, University of Montpellier, 34095 Montpellier Cedex 5, France.
3 Laboratory MIST, IRSN-CNRS-University of Montpellier, France.
* Corresponding author: email@example.com
Published online: 30 June 2017
This work addresses the study of capillary bridge properties between two grains, with use of recent analytical model, based on solutions of Young-Laplace equation from an inverse problem. A simple explicit criterion allows to classify the profile of capillary bridge as a surface of revolution with constant mean curvature (Delaunay roulette) using its measured geometrical parameters (gorge radius, contact angle, half-filling angle). Necessary data are obtained from experimental tests, realized on liquid bridges between two equal spherical grains. Sequences of images are recorded at several (fixed) volumes of liquid and different separations distances between the spheres (from contact to rupture), in laboratory and in micro-gravity conditions. For each configuration, an exact parametric representation of the meridian is revealed. Mean bridge curvature, internal pressure and intergranular capillary force are also determined.
© The Authors, published by EDP Sciences, 2017
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