Download or read book Analysis of Aerosol Particle Transport Deposition Removal and Resuspension in Turbulent Flows written by Haifeng Zhang and published by . This book was released on 2000 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Fluid Dynamics Study of Aerosol Transport and Deposition Mechanisms written by Yingjie Tang and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, various aerosol particle transport and deposition mechanisms were studied through the computational fluid dynamics (CFD) modeling, including inertial impaction, gravitational effect, lift force, interception, and turbophoresis, within different practical applications including aerosol sampling inlet, filtration system and turbulent pipe flows. The objective of the research is to obtain a better understanding of the mechanisms that affect aerosol particle transport and deposition, and to determine the feasibility and accuracy of using commercial CFD tools in predicting performance of aerosol sampling devices. Flow field simulation was carried out first, and then followed by Lagrangian particle tracking to obtain the aerosol transport and deposition information. The CFD-based results were validated with experimental data and empirical correlations. In the simulation of the aerosol inlet, CFD-based penetration was in excellent agreement with experimental results, and the most significant regional particle deposition occurred due to inertial separation. At higher free wind speeds gravity had less effect on particle deposition. An empirical equation for efficiency prediction was developed considering inertial and gravitational effects, which will be useful for directing design of similar aerosol inlets. In the simulation of aerosol deposition on a screen, a "virtual surface" approach, which eliminates the need for the often-ambiguous user defined functions, was developed to account for particle deposition due to interception. The CFD-based results had a good agreement compared with experimental results, and also with published empirical correlations for interception. In the simulation of turbulent deposition in pipe flows, the relation between particle deposition velocity and wall-normal turbulent velocity fluctuation was quantitative determined for the first time, which could be used to quantify turbulent deposition, without having to carry out Lagrangian particle tracking. It suggested that the Reynolds stress model and large eddy simulation would lead to the most accurate simulated aerosol deposition velocity. The prerequisites were that the wall-adjacent y+ value was sufficiently low, and that sufficient number of prism layers was applied in the near-wall region. The "velocity fluctuation convergence" would be useful criterion for judging the adequacy of a CFD simulation for turbulent deposition.
Download or read book Ash Pulverized Coal Deposition in Combustors Gasifiers written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Further progress in achieving the objectives of the project was made in the period of October 1 to December 31, 1996. In particular, the sublayer model for evaluating the particle deposition in turbulent flows was extended to include the effect of particle rebound. A new more advance flow model for the near wall vortices is also used in these analysis. The computational model for simulating particle transport in turbulent flows was used to analyze the dispersion and deposition of particles in a recirculating flow region. The predictions of the particle resuspension model is compared with the experimental data. It is shown that when the effects of the near wall flow structure, as we as the surface roughness are included the model agrees with the available experimental data. Considerable progress was also made in the direct numerical simulation of particle removal process in turbulent gas flows. Experimental data for transport and deposition of glass fiber in the aerosol wind tunnel was also obtained.
Download or read book Particle Adhesion and Removal written by K. L. Mittal and published by John Wiley & Sons. This book was released on 2015-01-06 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a comprehensive and easily accessible reference source covering all important aspects of particle adhesion and removal. The core objective is to cover both fundamental and applied aspects of particle adhesion and removal with emphasis on recent developments. Among the topics to be covered include: 1. Fundamentals of surface forces in particle adhesion and removal. 2. Mechanisms of particle adhesion and removal. 3. Experimental methods (e.g. AFM, SFA,SFM,IFM, etc.) to understand particle-particle and particle-substrate interactions. 4. Mechanics of adhesion of micro- and nanoscale particles. 5. Various factors affecting particle adhesion to a variety of substrates. 6. Surface modification techniques to modulate particle adhesion. 7. Various cleaning methods (both wet & dry) for particle removal. 8. Relevance of particle adhesion in a host of technologies ranging from simple to ultra-sophisticated.
Download or read book Analysis of Aerosol Particle Transport and Deposition in Environmental Applications written by Chaosheng Liu and published by . This book was released on 2006 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deposition and Reentrainment of Aerosol Particles on Model Filters written by Jim Chuin Yin and published by . This book was released on 1990 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Aerosol Deposition in Large and Small Square Flow Passages written by William Dwight Gerstler and published by . This book was released on 2000 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Impaction of Aerosol Particles on Cylindrical and Spherical Collectors written by W. E. Ranz and published by . This book was released on 1951 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impactions of small particles on cylindrical and spherical collectors was analyzed in terms of the forces which affect the motion of a particle and cause it to move from an aerosol stream onto a collecting surface. Dimensionless parameters which characterize the various mechanisms of collection are defined for inertial separation, interception, electrical attraction, and random molecular motion. Significant values of the parameters were determined. The various theories of impaction of aerosol particles on simple collectors were investigated and extended to a comprehensive statement of the general problem of impaction efficiencies. Practical applications to dust and smoke removal systems are indicated.
Download or read book Dispersion and Deposition of Heavy Particles in Turbulent Flows written by Chunyu Jin and published by . This book was released on 2012 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Aerosol Deposition Rates in Turbulent Flows written by James A. Gieseke and published by . This book was released on 1980 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2001 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiphase Flow Handbook Second Edition written by Efstathios Michaelides and published by CRC Press. This book was released on 2016-10-26 with total page 1559 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Multiphase Flow Handbook, Second Edition is a thoroughly updated and reorganized revision of the late Clayton Crowe’s work, and provides a detailed look at the basic concepts and the wide range of applications in this important area of thermal/fluids engineering. Revised by the new editors, Efstathios E. (Stathis) Michaelides and John D. Schwarzkopf, the new Second Edition begins with two chapters covering fundamental concepts and methods that pertain to all the types and applications of multiphase flow. The remaining chapters cover the applications and engineering systems that are relevant to all the types of multiphase flow and heat transfer. The twenty-one chapters and several sections of the book include the basic science as well as the contemporary engineering and technological applications of multiphase flow in a comprehensive way that is easy to follow and be understood. The editors created a common set of nomenclature that is used throughout the book, allowing readers to easily compare fundamental theory with currently developing concepts and applications. With contributed chapters from sixty-two leading experts around the world, the Multiphase Flow Handbook, Second Edition is an essential reference for all researchers, academics and engineers working with complex thermal and fluid systems.
Download or read book Bioaerosol Characterisation Transportation and Transmission written by Yihuan Yan and published by Springer Nature. This book was released on 2023-07-03 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to predict and model the transport of bioaerosols, identify their transmission characteristics, and assess occupants’ infection risks. Although existing epidemiological books provide fundamental infection rate of existing diseases, the ability of predicting emerging disease transmission in the air and assessing occupants’ infection risks to the bioaerosols is significantly lacking. This book is considered as a professional book that provides in-depth discussion of the aforementioned issues and provides potential approaches to solve these issues would be highly demanded by readers in this emerging research field. This book offers essential and systematic analysis on the fate of bioaerosols from their release in the air to the final destination in human’s respiratory systems through direct 3D visualizations techniques. It also provides quantifiable method to assess each occupant’s infection risks to the infectious bioaerosols in indoor environments. The readers will gain essential fundamental characteristics of bioaerosols (active time, viability, etc.) and will gain the advanced skills on how to integrate these properties into numerical modeling and assess the occupants’ exposure risks.
Download or read book Removal of Sulfuric Acid Aerosol Particles from Air Streams by Turbulent Deposition and Diffusiophoresis written by Mahmoud Kamran Azarniouch and published by 1973 [c1974]. This book was released on 1973 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dust Resuspension and the Implications for Contaminant Transport written by Gwendolen Ann Loosmore and published by . This book was released on 2000 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developments in Surface Contamination and Cleaning Volume 4 written by Rajiv Kohli and published by William Andrew. This book was released on 2011-10-24 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contributions in this volume cover methods for removal of particle contaminants on surfaces. Several of these methods are well established and have been employed in industrial applications for a long time. However, the ever- higher demand for removal of smaller particles on newer substrate materials is driving continuous development of the established cleaning methods and alternative innovative methods for particle removal. This book provides information on the latest developments in this topic area. The purpose of the Developments in Surface Contamination and Cleaning series is to provide a state-of-the-art guide to the current knowledge of the behaviour of film-type and particulate surface contaminants, and cleaning methods. Each title has a particular topical focus, covering the key techniques and recent developments in the area. Taken as a whole, the series forms a unique reference for professionals and academics working in the area of surface contamination and cleaning. A strong theme running through the series is that of surface contamination and cleaning at the micro and nano scales. Covers the latest techniques in areas such as removal of nanoparticles, especially important in the semiconductor industry, disk drives and microelectronics. The series as a whole represents the definitive reference on Surface Contamination and Cleaning An essential reference for industries where cleaning is critical: electronics, optics, pharmaceutical manufacturing, etc.
Download or read book Aerosol Measurement written by Pramod Kulkarni and published by John Wiley & Sons. This book was released on 2011-09-09 with total page 1497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerosol Measurement: Principles, Techniques, and Applications Third Edition is the most detailed treatment available of the latest aerosol measurement methods. Drawing on the know-how of numerous expert contributors; it provides a solid grasp of measurement fundamentals and practices a wide variety of aerosol applications. This new edition is updated to address new and developing applications of aerosol measurement, including applications in environmental health, atmospheric science, climate change, air pollution, public health, nanotechnology, particle and powder technology, pharmaceutical research and development, clean room technology (integrated circuit manufacture), and nuclear waste management.
