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The dynamics of reactive wetting on solid surfaces

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  • de Gennes, P.G.

Abstract

Hydrodynamic instabilities driven by chemical reactions at the interface between two liquids have been observed long ago, but lead to very complex situations. We focus here on a relatively simpler case, where a liquid reacts with a solid substrate. When the reaction makes the substrate less wettable, running droplets show up: a drop tends to escape from its own trail. We discuss these experiments and related situations: one interesting future possibility is offered by a solid, porous, bead soaked with the reactive fluid: this should roll spontaneously with velocities ∼1mm/s. Another sector of interest is stick-slip motions induced by a solid plate which is slowly plunging into a reactive fluid.

Suggested Citation

  • de Gennes, P.G., 1998. "The dynamics of reactive wetting on solid surfaces," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 249(1), pages 196-205.
    • Handle: RePEc:eee:phsmap:v:249:y:1998:i:1:p:196-205
    DOI: 10.1016/S0378-4371(97)00466-4
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