Download or read book Simulation of Particle Packing for Modelling the Light Scattering Characteristics of Paper written by Markku Leskelä and published by . This book was released on 1997 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tiivistelmät.
Download or read book A 3D Model of Paper Used for Light Scattering Simulations written by and published by . This book was released on 2002 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulation of Micro sized Granular Particle Packing Using Discrete Element Method written by Xin Dou (Engineering researcher) and published by . This book was released on 2014 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle packing has been studied experimentally and numerically in the recent years due to its wide applications in physics and engineering. Mechanical phenomena and physical properties in granular materials, such as fluid flow, stress distribution and electrical conductivity, and modeling the structure of materials such as liquids, amorphous and ceramic materials, have been studied. Granular packing simulation is usually used to model structures of materials that involved in the industry ranging from manufacturing raw materials to develop advanced products. The impact of particle properties on their packing structures is also of the prime importance to the whole packing process and is always an essential for industry fabrication. A better understanding of packing is beneficial to optimize and improve industrial processes. Generally speaking, packing is a dynamic process that involves contact forces due to the collision, rotation and friction among particles. In this work, granular packing of particles with three different sizes and three different size distributions (mono-sized, uniform and Gaussian) are simulated using Discrete Element Method. In addition to the contact force, four kinds of forces are considered in the simulations which include two dissipative forces: viscoelastic and frictional force, and two conservative forces: gravity and van der Waals force. The effect of van der Waals force on the packing structure of particles in micro-meter domain has been systematically investigated. The results showed that the effect of van der Waals force is not significant for the particle size and its distributions investigated in this paper. It is also found that even though our model is much simpler than the Hertz History Model, the final packing structure is very similar. Moreover, the tendencies of the force distributions and RDF results are the similar when particles have the same diameter and distribution. The effects of particle size and its distribution are more significant than the force model. In addition, under cohesive effect, packing structures of particles that have different radius and size distributions are also rigorously studied by analyzing RDF and force distribution, porosity and coordination number. The force involved includes normal and tangential contact force, viscoelastic force, friction force generated by collision between particle and particle or particle and boundary, cohesive force which is added through Johnson-Kendall-Roberts (JKR) model and gravity. It can be observed that particles with Gaussian distribution always have the highest packing density while the mono-sized particles have the medium packing density and particles with uniform size distribution normally have the lowest packing density. Besides, clear pattern of packing density cannot be found by changing particle radius. For particle packing under cohesive effect, size distributions always result in the same tendency of packing density while particle sizes do not. Coordination number is basically affected by particle sizes significantly while particle size distribution does not contribute much. Unlike the particle packing without cohesive effect that has a clear trend by changing particle size or distribution, when cohesive effect is added to the system it also gives the system some kind of uncertainty.
Download or read book Light Scattering by Irregularly Shaped Particles written by Schuerman and published by Springer. This book was released on 2012-03-26 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains most of the invited papers presented at the International Workshop on Light Scattering by Irregularly Shaped Particles held on June 5-7, 1979. at the State University of New York at Albany (SUNYA). Over seventy participants representing many dis ciplines convened to define some of the ever-increasing number of resonant light-scattering problems associated with particle shape and to relate their most recent investigations in this field. It is obvious from the two introductory papers that an investi gator's primary discipline determines his/her approach to the light scattering problem. The meteorologist, Diran Deirmendjian, advocates an empirical methodology: to model the scattering by atmospheric aerosols, using equivalent spheres as standards, in the most effi cient and simplest manner that is consistent with remote sensing, in situ, and laboratory· data. Because of the almost infinite variety of particle shapes, he questions not only the possibility but even the usefulness of the exact solution of scattering by a totally arbitrary particle. The astrophysicist, J. Mayo Greenberg, is primarily concerned with the information content carried by the scattered light because this radiation is the sole clue to under standing the nature of interstellar dust. What measurements (polar ization, color dependence, etc ••• ) should be made to best determine a given particle characteristic (size, surface roughness, refractive index, etc ••• )? Thus, he considers the physics of the scattering process to be of paramount interest.
Download or read book Multiple Scattering of Light by Particles written by Michael I. Mishchenko and published by Cambridge University Press. This book was released on 2006-04-27 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph on multiple scattering of light by small particles is an ideal resource for science professionals, engineers, and graduate students.
Download or read book Light Scattering by Nonspherical Particles written by Michael I. Mishchenko and published by Elsevier. This book was released on 1999-09-22 with total page 721 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is hardly a field of science or engineering that does not have some interest in light scattering by small particles. For example, this subject is important to climatology because the energy budget for the Earth's atmosphere is strongly affected by scattering of solar radiation by cloud and aerosol particles, and the whole discipline of remote sensing relies largely on analyzing the parameters of radiation scattered by aerosols, clouds, and precipitation. The scattering of light by spherical particles can be easily computed using the conventional Mie theory. However, most small solid particles encountered in natural and laboratory conditions have nonspherical shapes. Examples are soot and mineral aerosols, cirrus cloud particles, snow and frost crystals, ocean hydrosols, interplanetary and cometary dust grains, and microorganisms. It is now well known that scattering properties of nonspherical particles can differ dramatically from those of "equivalent" (e.g., equal-volume or equal-surface-area) spheres. Therefore, the ability to accurately compute or measure light scattering by nonspherical particles in order to clearly understand the effects of particle nonsphericity on light scattering is very important. The rapid improvement of computers and experimental techniques over the past 20 years and the development of efficient numerical approaches have resulted in major advances in this field which have not been systematically summarized. Because of the universal importance of electromagnetic scattering by nonspherical particles, papers on different aspects of this subject are scattered over dozens of diverse research and engineering journals. Often experts in one discipline (e.g., biology) are unaware of potentially useful results obtained in another discipline (e.g., antennas and propagation). This leads to an inefficient use of the accumulated knowledge and unnecessary redundancy in research activities. This book offers the first systematic and unified discussion of light scattering by nonspherical particles and its practical applications and represents the state-of-the-art of this important research field. Individual chapters are written by leading experts in respective areas and cover three major disciplines: theoretical and numerical techniques, laboratory measurements, and practical applications. An overview chapter provides a concise general introduction to the subject of nonspherical scattering and should be especially useful to beginners and those interested in fast practical applications. The audience for this book will include graduate students, scientists, and engineers working on specific aspects of electromagnetic scattering by small particles and its applications in remote sensing, geophysics, astrophysics, biomedical optics, and optical engineering. - The first systematic and comprehensive treatment of electromagnetic scattering by nonspherical particles and its applications - Individual chapters are written by leading experts in respective areas - Includes a survey of all the relevant literature scattered over dozens of basic and applied research journals - Consistent use of unified definitions and notation makes the book a coherent volume - An overview chapter provides a concise general introduction to the subject of light scattering by nonspherical particles - Theoretical chapters describe specific easy-to-use computer codes publicly available on the World Wide Web - Extensively illustrated with over 200 figures, 4 in color
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1994 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paper and Timber written by and published by . This book was released on 1994 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1992 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soft Matter Characterization written by Redouane Borsali and published by Springer Science & Business Media. This book was released on 2008-07-28 with total page 1490 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2-volume set includes extensive discussions of scattering techniques (light, neutron and X-ray) and related fluctuation and grating techniques that are at the forefront of this field. Most of the scattering techniques are Fourier space techniques. Recent advances have seen the development of powerful direct imaging methods such as atomic force microscopy and scanning probe microscopy. In addition, techniques that can be used to manipulate soft matter on the nanometer scale are also in rapid development. These include the scanning probe microscopy technique mentioned above as well as optical and magnetic tweezers.
Download or read book Nonlinear Optics of Random Media written by Vladimir M. Shalaev and published by Springer. This book was released on 2007-09-28 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear Optics of Random Media reviews recent advances in in one of the most prominent fields of physics. It provides an outline of the basic models of irregular structures of random inhomogeneous media and the approaches used to describe their linear electromagnetic properties. Nonlinearities in random media are also discussed. The chapters can be read independently, so scientists and students interested in a specific problem can go directly to the relevant text.
Download or read book Paper written by and published by . This book was released on 1982 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Powder Sampling and Particle Size Determination written by Terence Allen and published by Elsevier Science Limited. This book was released on 2003 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Important new work in rapidly expanding field of powder technology.
Download or read book Theoretical Chemical Engineering Abstracts written by and published by . This book was released on 1978 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optics and Spectroscopy written by and published by . This book was released on 2005 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scattering Absorption and Emission of Light by Small Particles written by Michael I. Mishchenko and published by Cambridge University Press. This book was released on 2002-06-06 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough and up-to-date treatment of electromagnetic scattering by small particles.
