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Self-propulsion of a metallic superoleophobic micro-boat [PDF]
Journal of Colloid and Interface Science, 2016 The self-propulsion of a heavy, superoleophobic, metallic micro-boat carrying a droplet of various aqueous alcohol solutions as a fuel tank is reported. The micro boat is driven by the solutocapillary Marangoni flow. The jump in the surface tension owing to the condensation of alcohols on the water surface was established experimentally.
Albina Musin +2 more
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Annual Review of Fluid Mechanics, 2017
It is well-known that micro- and nanoparticles can move by phoretic effects in response to externally imposed gradients of scalar quantities such as chemical concentration or electric potential. A class of active colloids can propel themselves through aqueous media by generating local gradients of concentration and electrical potential via surface ...
Jeffrey L. Moran, Jonathan D. Posner
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It is well-known that micro- and nanoparticles can move by phoretic effects in response to externally imposed gradients of scalar quantities such as chemical concentration or electric potential. A class of active colloids can propel themselves through aqueous media by generating local gradients of concentration and electrical potential via surface ...
Jeffrey L. Moran, Jonathan D. Posner
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Self-Propulsion at Low Reynolds Number
Physical Review Letters, 1987We formulate the problem of self-propulsion at low Reynolds number in terms of a gauge field over the space of shapes. The computation of this field is discussed, and carried out in some examples. We apply our results to determine maximally efficient infinitesimal swimming motions of spheres and circular cylinders.
, Shapere, , Wilczek
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Self-propulsion on liquid surfaces
Current Opinion in Colloid & Interface Science, 2014Abstract Surface tension gradients are at the origin of the self-motion and deformation of millimeter-sized floating objects. For (quasi-)non-deformable systems, like solids and gels, the motion-mode is mainly controlled by the shape of the object and by the way the surface active propellant is released on the surrounding surface.
Véronique Pimienta, Charles Antoine
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Enhanced diffusion of pollutants by self-propulsion
Physical Chemistry Chemical Physics, 2011Current environmental models mostly account for the passive participation of pollutants in their environmental propagation. Here we demonstrate the paradigm-changing concept that pollutants can propagate themselves with a rate that is greater than the rate for standard molecular diffusion by five orders of magnitude.
Guanjia, Zhao +2 more
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Convective Self-propulsion of Continents
Nature, 1967When a thin sheet of material in which the thermal resistance is not symmetric about a central point floats on a heated viscous fluid, it is propelled by the induced convective motion. This mechanism is used as a basis for a model of continental migration.
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Omni-directional self-propulsive trowelling robot
Proceedings. 1998 IEEE International Conference on Robotics and Automation (Cat. No.98CH36146), 2002A omni-directional self-propulsive trowelling robot is proposed. The proposed robot with two rotary trowels does not require any mechanism such as wheels to obtain driving forces. When the robot flattens a concrete floor with its two rotating trowels, the unbalanced friction forces occur between the trowels and the concrete floor. These friction forces
null Dong Hun Shin +3 more
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Infinite Self‐Propulsion of Circularly On/Discharged Droplets
Advanced MaterialsAbstractSelf‐propulsion of droplets in a controlled and long path at a high‐speed is crucial for organic synthesis, pathological diagnosis and programable lab‐on‐a‐chip. To date, extensive efforts have been made to achieve droplet self‐propulsion by asymmetric gradient, yet, existing structural, chemical, or charge density gradients can only last for a
Lei Jiang, Liping Heng, Zhichao Dong
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Self-propulsion of Contaminated Microbubbles
2020In many natural and industrial processes, bubbles are exposed to surface-active contaminants (surfactants) that may cover the whole or part of the bubble interface. A partial coverage of the bubble interface results in a spontaneous self-propulsion mechanism, which is yet poorly understood.The main goal of this study is to enhance the understanding of ...
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CFD Automated Self Propulsion Test
2018CFD simulations are becoming more and more reliable and the increasing computational power are making them a convenient tool to investigate complex phenomena and to reproduce the experimental tests. In the hydrodynamic design process the correct evaluation of the self propulsion performance is an essential item to access the true performances of the ...
Gustin Gianluca +2 more
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