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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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Self-Propulsion and Active Motion of Janus Ellipsoids
The Journal of Physical Chemistry B, 2018The propulsion of platinum-coated polystyrene prolate ellipsoids, as generated by catalytic decomposition of hydrogen peroxide, is characterized by direct visualization of the trajectories of the active particles. These Janus ellipsoids were fabricated by stretching micron-sized polystyrene spheres into different aspect ratios; half of the particle is ...
Onajite Shemi, Michael J. Solomon
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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
Dong Hun Shin +3 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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Self-Propulsion of a Capsule on a Viscous Surface
Design Engineering and Computers and Information in Engineering, Parts A and B, 2006We propose a mechanical model for a capsule containing a piezoelectric actuator. The interfacial interaction between the capsule and a surface is assumed to be viscous. Nonlinearity in the interfacial force such as shear thickening is assumed to be present.
Mark McLellan, Mingxuan Fan, Z. C. Feng
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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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