All Outputs (6)

Collective behavior of composite active particles (2022)
Journal Article
Eglinton, J., Smith, M. I., & Swift, M. R. (2022). Collective behavior of composite active particles. Physical Review E, 105(4), Article 044609. https://doi.org/10.1103/PhysRevE.105.044609

We describe simulations of active Brownian particles carried out to explore how dynamics and clustering are influenced by particle shape. Our particles are composed of four disks, held together by springs, whose relative size can be varied. These com... Read More about Collective behavior of composite active particles.

Collision-enhanced friction of a bouncing ball on a rough vibrating surface (2021)
Journal Article
Smith, N. D., Swift, M. R., & Smith, M. I. (2021). Collision-enhanced friction of a bouncing ball on a rough vibrating surface. Scientific Reports, 11, Article 442. https://doi.org/10.1038/s41598-020-80067-w

We describe experiments and simulations to investigate the dynamics of a ball bouncing on a rough vibrating surface. Directly measuring the impulse due to each bounce we find that the frictional interaction with the surface is strongly enhanced near... Read More about Collision-enhanced friction of a bouncing ball on a rough vibrating surface.

Reduced thermodynamic description of phase separation in a quasi-one-dimensional granular gas (2019)
Journal Article
Clewett, J. P., Bowley, R., & Swift, M. R. (2019). Reduced thermodynamic description of phase separation in a quasi-one-dimensional granular gas. Physical Review Letters, 123(11), Article 118001. https://doi.org/10.1103/PhysRevLett.123.118001

We describe simulations of a quasi-one-dimensional, vibrated granular gas which exhibits an apparent phase separation into a liquidlike phase and a gaslike phase. In thermal equilibrium, such a phase separation in one dimension is prohibited by entro... Read More about Reduced thermodynamic description of phase separation in a quasi-one-dimensional granular gas.

Magnetic Levitation Stabilized by Streaming Fluid Flows (2018)
Journal Article
Fairhurst, D., Swift, M., Hill, R., Atkinson, P., Baldwin, K., Baldwin, K., …Fairhurst, D. (2018). Magnetic Levitation Stabilized by Streaming Fluid Flows. Physical Review Letters, 121(6), 1-5. https://doi.org/10.1103/physrevlett.121.064502

We demonstrate that the ubiquitous laboratory magnetic stirrer provides a simple passive method of magnetic levitation, in which the so-called ‘flea’ levitates indefinitely. We study the onset of levitation and quantify the flea’s motion (a combinati... Read More about Magnetic Levitation Stabilized by Streaming Fluid Flows.

Ice as a granular material (2016)
Presentation / Conference Contribution
Turnbull, B., Swift, M., & Hill, R. (2016). Ice as a granular material.

Ice is a unique material, fundamental to vital processes on earth, in the atmosphere [1] and as planets and comets form [2]. In this work, we introduce two experiments investigating ice as a granular material, to provide snippets of insight into thos... Read More about Ice as a granular material.

Spontaneous orbiting of two spheres levitated in a vibrated liquid (2013)
Journal Article
Pacheco Martinez, H., Liao, L., Hill, R., Swift, M. R., & Bowley, R. (2013). Spontaneous orbiting of two spheres levitated in a vibrated liquid. Physical Review Letters, 110(15), Article 154501. https://doi.org/10.1103/PhysRevLett.110.154501

In the absence of gravity, particles can form a suspension in a liquid irrespective of the difference in density between the solid and the liquid. If such a suspension is subjected to vibration there is relative motion between the particles and the f... Read More about Spontaneous orbiting of two spheres levitated in a vibrated liquid.