Optical trapping can manipulate the three-dimensional (3D) motion of spherical particles based on the simple prediction of optical forces and the responding motion of samples. However, controlling the 3D behaviour of non-spherical particles with arbitrary orientations is extremely challenging, due to experimental difficulties and extensive computations. Here, we achieve the real-time optical co...

It is shown that the trapping of finite-sized spherical Brownian particles of radius /3R in a system of interpenetrable spherical traps of radius R is isomorphic to the trapping of “point” Brownian particles (p = 0) in a particular system of interpenetrable spherical traps of radius ( 1 + p> R. This isomorphism in conjunction with previous trapping-rate data for fl= 0 is employed to compute the...

Existing ice crystal icing codes commonly neglect non-spherical particle rotation behaviour. This leads to uncertainties in modelling as crystals are typically non-spherical. paper develops a two-dimensional framework model the trajectory and melting behaviour of rotating particles. Non-spherical translational rotational motions resolved using unit complex numbers. The effect on heat mass trans...

Mineral particles, in general, are not spheres and so the assumption of spherical particles, instead of more realistic shapes, has significant effects on modeled optical properties and therefore on remote-sensing procedures for desert aerosol and the derived radiative forcing. Thus, in a new version of the database OPAC (Optical Properties of Aerosols and Clouds; Hess et al., 1998), the optical...

There has been growing interest in applying the DEM (discrete element method) to study charging and burden distribution a BF (blast furnace). In practice, real particles are non-spherical. However, spherical have mostly used previous investigations. Furthermore, various particle models developed describe non-spherical particles. effects of using different on behavior still unclear. Therefore, c...

Surface wrinkled particles are ubiquitous in nature and present in different sizes and shapes, such as plant pollens and peppercorn seeds. These natural wrinkles provide the particles with advanced functions to survive and thrive in nature. In this work, by combining flow lithography and plasma treatment, we have developed a simple method that can rapidly create wrinkled non-spherical particles...

Mono dispersed nano SiC particles with spherical morphology were synthesized in this project by hydrolysis and condensation mechanism during sol gel processing. pH, temperature and precursor’s ratio considered as the main parameters which could influence particles size. According to DLS test results, the smallest size of particles in the sol (<5nm) was obtained at pH<4. It can be observed from ...

Preferential particle orientation has been previously reported for desert dust and attributed on atmospheric electricity (Ulanowski et al., 2007). Depending its strength, the total electric field within layer can: (a) counteract gravitational settling of large particles (b) cause a preferential non-spherical along vertical direction (Fucks, 1958; Ulanowski Both effects change aerodynamics impac...