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  • Title: Drift instability in the motion of a fluid droplet with a chemically reactive surface driven by Marangoni flow.
    Author: Yoshinaga N, Nagai KH, Sumino Y, Kitahata H.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2012 Jul; 86(1 Pt 2):016108. PubMed ID: 23005492.
    Abstract:
    We theoretically derive the amplitude equations for a self-propelled droplet driven by Marangoni flow. As advective flow driven by surface tension gradient is enhanced, the stationary state becomes unstable and the droplet starts to move. The velocity of the droplet is determined from a cubic nonlinear term in the amplitude equations. The obtained critical point and the characteristic velocity are well supported by numerical simulations.
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