Application of Computational Fluid Dynamics to Aerosol Sampling and Concentration
Application of Computational Fluid Dynamics to Aerosol Sampling and Concentration

Author: Shishan Hu

Publisher:

Published: 2010

Total Pages:

ISBN-13:

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An understanding of gas-liquid two-phase interactions, aerosol particle deposition, and heat transfer is needed. Computational Fluid Dynamics (CFD) is becoming a powerful tool to predict aerosol behavior for related design work. In this study, FLUENT 6 is used to analyze the performance of aerosol sampling and concentration devices including inlet components (impactors), cyclones, and virtual impactors. The k--[omega] model was used to predict particle behavior in Inline Cone Impactor (ICI) and Jet-in-Well impactor (JIW). Simulation provided excellent agreement with experimental test results for a compact ICI. In the JIW, compound impaction is shown to cause the device to have a smaller cutpoint Stokes number than the single impaction unit. The size ratio of the well-to-jet was analyzed to find its influence on the total and side collections. Simulation is used to analyze liquid film, flow structure, particle collection, pressure drop, and heating requirements for a bioaerosol sampling cyclone. A volume of fluid model is used to predict water film in an earlier cyclone. A shell-volume is developed to simulate thin liquid film in large device. For the upgraded version cyclone, simulation is verified to successfully predict cutpoint and pressure drop. A narrowing-jet is shown to describe the flow evolution inside the axial flow cyclone. Turbulent heat transfer coefficients and surface temperatures are analyzed and heaters are designed for this cyclone. A double-outlet cyclone was designed and its pressure drop decreased about 25%, compared with a single-outlet cyclone. A scaled-down 100 L/min cyclone was also designed and tested based on the 1250 L/min unit. CFD is used to design a Circumferential Slot Virtual Impactor (CSVI) which is used for concentration of bioaerosol particles. Simulations showed a 3-D unstable flow inside an earlier version CSVI, which could explain acoustic noise and particle loss observed in the experiment. A smaller CSVI unit was designed using simulation and its flow was shown to be stable. CFD was then used to analyze the wake flow downstream of the posts to reduce particle losses and eliminate flow instabilities caused by wakes. A successful solution, moving the posts outside was developed by the use of CFD.

Applications and Computational Elements of Industrial Hygiene.
Applications and Computational Elements of Industrial Hygiene.

Author: Martin B. Stern

Publisher: CRC Press

Published: 2018-04-24

Total Pages: 860

ISBN-13: 1351466240

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Presenting the only textbook available today that covers all of the critical elements of industrial hygiene ó conceptual information, computational coverage, case studies, and sample problems and exercises ó in one volume. Organized around the basic rubrics of industrial hygiene, this book helps students to think like industrial hygienists while offering the latest techniques for practicing professionals. Applications and Computational Elements of Industrial Hygiene is the most complete reference available on IH, and is also an ideal study aid for exam preparation. This is the first and only textbook that includes all critical computations for each concept covered. Each chapter discusses a different hazard and how to recognize, evaluate, and control it. The advantage of this approach is clear; technical issues, instrumental techniques, engineering control procedures ó relevant issues from A to Z ó are discussed for each hazard. Chapters conclude with case studies that offer critical insight into the practical aspects of the field. The book also covers emerging issues that will affect industrial hygienists in the future. The book includes real-life situations and experiences to demonstrate practical applications of concepts presented in the text. For students, Applications and Computational Elements of Industrial Hygiene offers critical material formerly scattered across multiple sources. For seasoned industrial hygienists, this is an essential problem-solving tool and state-of-the-art reference that consolidates and updates previously scattered information.

Aerosol Measurement
Aerosol Measurement

Author: Pramod Kulkarni

Publisher: John Wiley & Sons

Published: 2011-07-12

Total Pages: 920

ISBN-13: 0470387416

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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.

Computational Fluid Dynamics Applications in Bio and Biomedical Processes
Computational Fluid Dynamics Applications in Bio and Biomedical Processes

Author: Satya Eswari Jujjavarapu

Publisher: Springer Nature

Published: 2024-01-17

Total Pages: 198

ISBN-13: 9819971292

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This book covers emerging areas in novel design and their hydrodynamic properties relevant to bioreactors, environmental system, electrochemical systems, food processing and biomedical engineering. This book uses an interdisciplinary approach to provide a comprehensive prospective simulation modeling and hydrodynamic study in advanced biotechnological process and includes reviews of the most recent state of art in modeling and simulation of flows in biological process, such as CFD. Written by internationally recognized researchers in the field, each chapter provides a strong introductory section that is useful to both readers currently in the field and readers interested in learning more about these areas.

Computational Fluid Dynamics
Computational Fluid Dynamics

Author: Adela Ionescu

Publisher: BoD – Books on Demand

Published: 2018-02-14

Total Pages: 412

ISBN-13: 9535137905

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This book is the result of a careful selection of contributors in the field of CFD. It is divided into three sections according to the purpose and approaches used in the development of the contributions. The first section describes the "high-performance computing" (HPC) tools and their impact on CFD modeling. The second section is dedicated to "CFD models for local and large-scale industrial phenomena." Two types of approaches are basically contained here: one concerns the adaptation from global to local scale, - e.g., the applications of CFD to study the climate changes and the adaptations to local scale. The second approach, very challenging, is the multiscale analysis. The third section is devoted to "CFD in numerical modeling approach for experimental cases." Its chapters emphasize on the numerical approach of the mathematical models associated to few experimental (industrial) cases. Here, the impact and the importance of the mathematical modeling in CFD are focused on. It is expected that the collection of these chapters will enrich the state of the art in the CFD domain and its applications in a lot of fields. This collection proves that CFD is a highly interdisciplinary research area, which lies at the interface of physics, engineering, applied mathematics, and computer science.

Springer Handbook of Atmospheric Measurements
Springer Handbook of Atmospheric Measurements

Author: Thomas Foken

Publisher: Springer Nature

Published: 2021-11-09

Total Pages: 1761

ISBN-13: 3030521710

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This practical handbook provides a clearly structured, concise and comprehensive account of the huge variety of atmospheric and related measurements relevant to meteorologists and for the purpose of weather forecasting and climate research, but also to the practitioner in the wider field of environmental physics and ecology. The Springer Handbook of Atmospheric Measurements is divided into six parts: The first part offers instructive descriptions of the basics of atmospheric measurements and the multitude of their influencing factors, fundamentals of quality control and standardization, as well as equations and tables of atmospheric, water, and soil quantities. The subsequent parts present classical in-situ measurements as well as remote sensing techniques from both ground-based as well as airborn or satellite-based methods. The next part focusses on complex measurements and methods that integrate different techniques to establish more holistic data. Brief discussions of measurements in soils and water, at plants, in urban and rural environments and for renewable energies demonstrate the potential of such applications. The final part provides an overview of atmospheric and ecological networks. Written by distinguished experts from academia and industry, each of the 64 chapters provides in-depth discussions of the available devices with their specifications, aspects of quality control, maintenance as well as their potential for the future. A large number of thoroughly compiled tables of physical quantities, sensors and system characteristics make this handbook a unique, universal and useful reference for the practitioner and absolutely essential for researchers, students, and technicians.

Computational Fluid Dynamics
Computational Fluid Dynamics

Author: Hyoung Woo Oh

Publisher: BoD – Books on Demand

Published: 2010-01-01

Total Pages: 430

ISBN-13: 9537619591

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This book is intended to serve as a reference text for advanced scientists and research engineers to solve a variety of fluid flow problems using computational fluid dynamics (CFD). Each chapter arises from a collection of research papers and discussions contributed by the practiced experts in the field of fluid mechanics. This material has encompassed a wide range of CFD applications concerning computational scheme, turbulence modeling and its simulation, multiphase flow modeling, unsteady-flow computation, and industrial applications of CFD.

Aerosols Handbook
Aerosols Handbook

Author: Lev S. Ruzer

Publisher: CRC Press

Published: 2012-08-15

Total Pages: 669

ISBN-13: 1439855102

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With the rapid growth of the nanotechnology industry, the need to understand the biological effects of aerosol exposure has become increasingly important. Featuring contributions by leading experts in the field, Aerosols Handbook: Measurement, Dosimetry, and Health Effects, Second Edition offers an up-to-date overview of many aspects of aerosols, from properties to health effects and epidemiology. Covering indoor, outdoor, industrial, medical, pharmaceutical, and radioactive aerosols, this book explores aerosol dosimetry by defining terms such as exposure and dose. In addition, it looks at nanometer particles, the mechanism of aerosol deposition in the lungs, and modeling deposition with a corresponding uncertainty in risk assessment. The text also emphasizes the importance of accurate aerosol measurements, particularly breathing zone exposure assessments. Examining radioactive aerosols, the book discusses lessons learned from nuclear accidents, radon and thoron, and long-lived radionuclides in the environment. It brings together research on both radioactive and nonradioactive aerosols, supplying readers with a more complete view of how aerosols behave in the lungs. New in This Edition Five new chapters that address the safety of nanomaterials, dealing with nanoparticle cell penetration, high aspect ratio nanomaterials, nanoaerosols in drug delivery, risk assessment, and health effects New chapters on atmospheric pollution related to climate change, chemical analyses of particle filter deposits, and classical nucleation theory New data on measurement, dosimetry, and health effects Updated throughout, this second edition continues to be an essential resource for those who study exposure, dosages, and toxicity to develop treatments for exposure, reduce air pollution, and establish better safety regulations, particularly in industries using nanotechnologies.

Handbook of Nanosafety
Handbook of Nanosafety

Author: Ulla Vogel

Publisher: Elsevier

Published: 2013-12-17

Total Pages: 377

ISBN-13: 0124166628

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Handbook of Nanosafety: Measurement, Exposure and Toxicology, written by leading international experts in nanosafety, provides a comprehensive understanding of engineered nanomaterials (ENM), current international nanosafety regulation, and how ENM can be safely handled in the workplace. Increasingly, the importance of safety needs to be considered when promoting the use of novel technologies like ENM. With its use of case studies and exposure scenarios, Handbook of Nanosafety demonstrates techniques to assess exposure and risks and how these assessments can be applied to improve workers' safety. Topics covered include the effects of ENM on human health, characterization of ENM, aerosol dynamics and measurement, exposure and risk assessment, and safe handling of ENM. Based on outcomes from the NANODEVICE initiative, this is an essential resource for those who need to apply current nanotoxicological thinking in the workplace and anyone who advises on nanosafety, such as professionals in toxicology, occupational safety and risk assessment. - Multi-authored book, written by leading researchers in the field of nanotoxicology and nanosafety - Features state-of-the-art physical and chemical characterization of engineered nanomaterials (ENM) - Develops strategies for exposure assessment, risk assessment and risk management - Includes practical case studies and exposure scenarios to demonstrate how you can safely use ENM in the workplace