Large-scale frictionless jamming with power-law particle size distributions [PDF]
, 2022 Due to significant computational expense, discrete element method simulations of jammed packings of size-dispersed spheres with size ratios greater than 1:10 have remained elusive, limiting the correspondence between simulations and real-world granular materials with large size dispersity.
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Particle-size-dependent acoustophoretic motion and depletion of micro- and nanoparticles at long time scales [PDF]
Phys. Rev. E 102, 013108 (2020), 2020 We present three-dimensional measurements of size-dependent acoustophoretic motion of microparticles with diameters from 4.8 um down to 0.5 um suspended in either homogeneous or inhomogeneous fluids inside a glass-silicon microchannel and exposed to a standing ultrasound wave.
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On the micro PIV accuracy and reliability utilizing suspension particles of large, non-Gaussian particle image [PDF]
Exp Fluids 62, 191 (2021), 2020 Optical investigations on the dynamics of dense suspensions are challenging due to reduced optical accessibility. Furthermore, the suspension particle image size can strongly deviate from the optimal particle image size for PIV measurements. Optical accessibility can be achieved by refractive index matching of surface labelled suspension particles ...
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Utilizing bifurcations to separate particles in spiral inertial microfluidics [PDF]
, 2022 Particles suspended in fluid flow through a closed duct can focus to specific stable locations in the duct cross-section due to hydrodynamic forces arising from the inertia of the disturbed fluid. Such particle focusing is exploited in biomedical and industrial technologies to separate particles by size.
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Effects of particle size-shape correlations on shear strength of granular materials: The case of particle elongation [PDF]
, 2021 Granular materials often present correlations between particle size and shape due to their geological formation and mechanisms of weathering and fragmentation. It is known that particle shape strongly affects shear strength. However, the effects of shape can be modified by the role the particle plays in a sample given its size.
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Theory for the single-particle dynamics in glassy mixtures with particle size swaps [PDF]
J. Stat. Mech. (2019) 104016, 2019 We present a theory for the single-particle dynamics in binary mixtures with particle size swaps. The general structure of the theory follows that of the theory for the collective dynamics in binary mixtures with particle size swaps, which we developed previously [G. Szamel, Phys. Rev. E 98, 050601(R) (2018)].
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Dynamics of a system of sticking particles of a finite size on the line [PDF]
, 2006 The continuous limit of large systems of particles of finite size on the line is described. The particles are assumed to move freely and stick under collision, to form compound particles whose mass and size is the sum of the masses and sizes of the particles before collision, and whose velocity is determined by conservation of linear momentum.
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Two-Particle Circular Billiards Versus Randomly Perturbed One-Particle Circular Billiards [PDF]
Chaos 23, 013123 (2013), 2012 We study a two-particle circular billiard containing two finite-size circular particles that collide elastically with the billiard boundary and with each other. Such a two-particle circular billiard provides a clean example of an "intermittent" system.
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Micrometer-sized ice particles for planetary-science experiments - I. Preparation, critical rolling friction force, and specific surface energy [PDF]
, 2011 Coagulation models assume a higher sticking threshold for micrometer-sized ice particles than for micrometer-sized silicate particles. However, in contrast to silicates, laboratory investigations of the collision properties of micrometer-sized ice particles (in particular, of the most abundant water ice) have not been conducted yet.
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Ion sound and dust acoustic waves at finite size of plasma particles [PDF]
Phys. Plasmas 22, 032104 (2015), 2014 We consider influence of finite size of ions on properties of classic plasmas. We focus our attention on the ion sound for electron-ion plasmas. We also consider dusty plasmas, where we account finite size of ions and particles of dust and consider the dispersion of dust acoustic waves.
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