Towards active microfluidics: Interface turbulence in thin liquid films with floating molecular machines

Details Towards active microfluidics: Interface turbulence in thin liquid films with floating molecular machines Towards active microfluidics: Interface turbulence in thin liquid films with floating molecular machines

2008-10-09

arxiv.org/abs/0810.1595v1

Nonlinear Sciences

Pattern Formation and Solitons

9 pages, 8 figures, RevTeX, submitted to Physical Review E

Scientific paper

Thin liquid films with floating active protein machines are considered. Cyclic mechanical motions within the machines, representing microscopic swimmers, lead to molecular propulsion forces applied to the air-liquid interface. We show that, when the rate of energy supply to the machines exceeds a threshold, the flat interface becomes linearly unstable. As the result of this instability, the regime of interface turbulence, characterized by irregular traveling waves and propagating machine clusters, is established. Numerical investigations of this nonlinear regime are performed. Conditions for the experimental observation of the instability are discussed.

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