Propulsion of bullet- and cup-shaped nano- and microparticles by traveling ultrasound waves
arXiv:2209.12582 · doi:10.1063/5.0089367
Abstract
The propulsion of colloidal particles via planar traveling ultrasound waves has attracted increasing attention in recent years. A frequently studied type of particles is bullet-shaped and cup-shaped nano- and microparticles. Based on acoustofluidic simulations, this article investigates how the propulsion of bullet-shaped particles depends on their length and diameter, where cup-shaped particles are included as limiting cases corresponding to the smallest particle length. The structure of the flow field generated by the particles is discussed and it is shown that the particles' propulsion strength increases with their length and diameter. When varying the diameter, we observed also a sign change of the propulsion. This work complements previous experimental studies that have addressed such particles only for particular aspect ratios, and the provided understanding of how the propulsion of the particles depends on their dimensions will prospectively be helpful for the choice of particle shapes that are most suitable for future experimental studies.
10 pages, 3 figures
References in corpus (10)
- Asymmetric steady streaming as a mechanism for acoustic propulsion of rigid bodies
- On the shape-dependent propulsion of nano- and microparticles by traveling ultrasound waves
- Orientation-dependent propulsion of cone-shaped nano- and microparticles by a traveling ultrasound wave
- Acoustically propelled nano- and microcones: fast forward and backward motion
- Purely viscous acoustic propulsion of bimetallic rods
- Acoustic propulsion of nano- and microcones: dependence on the viscosity of the surrounding fluid
- Collective guiding of acoustically propelled nano- and microparticles for medical applications
- Propulsion of bullet- and cup-shaped nano- and microparticles by traveling ultrasound waves
- Acoustic propulsion of nano- and microcones: dependence on particle size, acoustic energy density, and sound frequency
- Ultrasound-propelled nano- and microspinners