We study the effects of particle shape on the absorption and scattering cross sections of randomly oriented particles in the Rayleigh domain, i.e. particles that are very small compared to the wavelength of radiation both inside and outside the particle. In particular, we investigate the validity of the so-called statistical approach. In this approach it is assumed that the scattering and absor...

This research presents a mathematical framework that places the physics and dynamics of viscosity within physical environment captures effect shape overall weight non-spherical particles to calculate their settling velocity. It then takes insights derived from model analytical constructs solve motion single particle settles in fluid moves horizontally as whole. These are shown be applicable sph...

Air filters efficiency is usually determined by non-biological test aerosols, such as potassium chloride particles, Arizona dust or di-ethyl-hexyl-sebacate (DEHS) oily liquid. This research was undertaken to asses, if application of non-biological aerosols reflects air filters capacity to collect particles of biological origin. The collection efficiency for non-biological aerosol was tested wit...

Light scattering is an useful tool for the detection and characterization of different types of particles and simulation of the scattering process can help to understand the scattering characteristics. To simplify the computational simulation often axis-symmetric particles are used, while in reality particles usually do not show such simple structures. To cope with this, advanced methods and al...

Spherical and non-spherical magnetic hydrogel particles were synthesized in a microfluidic device containing an embedded UV light reflector. Monodisperse magnetic emulsion droplets were generated in a T-junction and allowed to relax into spheres, disks, and plugs in confining microchannel geometries. Particle morphology was locked-in via UV-initiated photopolymerization. The role of the reflect...

When a sessile droplet evaporates, coffee-ring effect drives the suspended particulate matters to the droplet edge, eventually forming a ring-shaped deposition. Because it causes a non-uniform distribution of solid contents, which is undesired in many applications, attempts have been made to eliminate the coffee-ring effect. Recent reports indicated that the coffee-ring effect can be suppressed...

Light scatting characteristic of smoke particles plays an important role for the developing of photoelectric smoke detection technology. An experimental setup is built to measure the Stokes scattering matrix for typical smoke particles. The results show that the non-spherical properties of smoke particles play an important role on their light scattering characteristic. It is also shown that the...

This paper puts forth homogenization solutions for the macroscopic elastic dielectric response—under finite deformations and finite electric fields—of ideal elastic dielectric composites with two-phase isotropic particulate microstructures. Specifically, solutions are presented for three classes of microstructures: (i) an isotropic iterative microstructure wherein the particles are infinitely p...