نتایج جستجو برای: particle shape

تعداد نتایج: 357208  

2007
Takahiro Harada Seiichi Koshizuka Yoichiro Kawaguchi

s: In this paper, we propose an improvement in boundary condition computation of Smoothed Particle Hydrodynamics. Generally, to calculate a wall boundary in particle methods, a wall is converted into particle representation and used as static particles. However, it has several issues, e.g., a boundary is discretized into particles and thus does not result in accurate representation of the bound...

Journal: :Soft matter 2015
John R Royer George L Burton Daniel L Blair Steven D Hudson

Recent advances in colloidal synthesis make it possible to generate a wide array of precisely controlled, non-spherical particles. This provides a unique opportunity to probe the role that particle shape plays in the dynamics of colloidal suspensions, particularly at higher volume fractions, where particle interactions are important. We examine the role of particle shape by characterizing both ...

2012
Pardeep kumar Jasvinder Kaur Sandeep Kumar Kuldeep Vats

Mineral Aerosol dusts have complex non spherical shapes and varying composition. This is utilizes data on morphology (size and shape) and composition of dust particles to determine the extent to which the optical properties of real particles differ from those of spheres. In morphology we find the aspect ratio, circularity factor and radius than discuss the size and shape of the aerosol dust par...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2014
H H Wensink V Kantsler R E Goldstein J Dunkel

Many structural properties of conventional passive materials are known to arise from the symmetries of their microscopic constituents. By contrast, it is largely unclear how the interplay between particle shape and self-propulsion controls the meso- and macroscale behavior of active matter. Here we use large-scale simulations of homo- and heterogeneous self-propelled particle systems to identif...

Journal: :Biomicrofluidics 2014
John Dubose Xinyu Lu Saurin Patel Shizhi Qian Sang Woo Joo Xiangchun Xuan

Shape is an intrinsic marker of cell cycle, an important factor for identifying a bioparticle, and also a useful indicator of cell state for disease diagnostics. Therefore, shape can be a specific marker in label-free particle and cell separation for various chemical and biological applications. We demonstrate in this work a continuous-flow electrical sorting of spherical and peanut-shaped part...

2012
G. Q Jing Y. D Zhou Jian Lin J. Zhang

Ballast flying problems obsess the ballasted high speed railway, its microscopic mechanics is less of discovered. In the paper, the railway ballast particle force equilibrium is analyzed through basic mechanics and mathematic formula, and a model is set up to discover the factors and influence. The microscopic ballast flying model is used for ballast bed geometry and ballast shape optimization,...

2001
Colleen M. Riley William I. Rose Gregg J.S. Bluth

Large-scale volcanic eruptions produce fine ash (< 200 μm) which has a long atmospheric residence time (1 hour or more) and can be transported great distances from the volcanic source, thus, becoming a hazard to aircraft and public health. Ash particles have irregular shapes, so data on particle shape, size, and terminal velocities are needed to understand how the irregular-shaped particles aff...

Journal: :Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention 2008
Joshua E. Cates P. Thomas Fletcher Martin Styner Heather Cody Hazlett Ross T. Whitaker

This paper presents a new method for optimizing surface point correspondences for shape modeling of multiobject anatomy, or shape complexes. The proposed method is novel in that it optimizes correspondence positions in the full, joint shape space of the object complex. Researchers have previously only considered the correspondence problem separately for each structure, thus ignoring the interst...

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