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Noise-induced kinetic model for autonomous motion of the contact line in oil-water systems with chemical reactions

Noise-induced kinetic model for autonomous motion of the contact line in oil-water systems with chemical reactions,10.1103/PhysRevE.77.036208,Physical

Noise-induced kinetic model for autonomous motion of the contact line in oil-water systems with chemical reactions  
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A model for autonomous motion of the contact line of the oil-water interface along a solid surface is proposed. The present model is inspired by the spontaneous wave generation and the contact line motion of an oil-water interface composed of cationic surfactant and oil-soluble anions. The motion is created through wetting by an adsorption of surfactant followed by an autocatalytic process with a chemical reaction and also dewetting due to the desorption of the remaining monolayer. The wetting process is accelerated by the contact line motion itself through the convection-enhanced transport of reaction constituents, which is autocatalytic in nature. These processes are expressed by nonlinear time-evolution equations for the velocity and the amplitude. Following the model, the autonomous motion is essentially excitable, and hence the spatiotemporal pattern is of the noise-induced type. The present model explains well the diverse features of the experimental results with a few parameters.
Journal: Physical Review E - PHYS REV E , vol. 77, no. 3, 2008
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