Author: Carolin Schober
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author:
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ISBN:
Category :
Languages : en
Pages :

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Fibrous and membrane filters are very commonly used for filtration. In this study we use monolith filters, holes arranged on thin film, which are similar to membranes except that holes are precisely drilled. Such filters insure a high surface to volume ratio, which improves overall filtration efficiencies as particle capture occurs on the surface of the membrane. This study involves filtration of sub-micron particles using electrostatically charged monoliths and modeling such a filter presents many challenges. At such a length scales, although the flow is laminar, wall boundary may have to be modeled as slip. Another, perhaps more important, challenge is to model realistic electric field. The flow field and filtration efficiency of electrostatically charged micro-channel filters under cross flow conditions were modeled. Particles with diameters larger than 2 microns were considered in this study, and hence the effects of Brownian motion were not included in the simulations. We investigated the effects of particle size and electrostatic charge on the filtration efficiency. The simulation results of electric field matched qualitatively to experimental data generated using electrostatic force microscopy (EFM) and compared with theoretical values calculated using Gaussââ'¬â"¢s Law. From the simulations, we found that for particle sizes greater than three microns, inertial impaction was the dominant force. Moreover results show that such filters can be used to separate out a particular size of particles. This also depends on the ratio of particle radius to hole-radius, velocity of uid, pressure drop across the filter and arrangement of holes in the filter.

Author:
Publisher:
ISBN:
Category : Artists, Australian
Languages : en
Pages :

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Author: Wallace Woon-Fong Leung
Publisher: Elsevier
ISBN: 0323859852
Category : Technology & Engineering
Languages : en
Pages : 572

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Nanofiber Filter Technologies for Filtration of Submicron Aerosols and Nanoaerosols covers the nanoaerosols (less than 100 nanometers) to larger submicron aerosols due mostly to pollution, which are present in high number concentration in our surroundings. People are breathing these nanoaerosols daily without being aware of it. Airborne viruses from flu to coronaviruses are also nanoaerosols. During the COVID-19 pandemic, it took a long time for health authorities and the General Public to recognize the airborne transmission mode of the virus. This leads to inadequate protection and ineffective virus control strategies resulting in high infection and death rates. The book cites evidence and observations pointing to the airborne transmission mode of the coronavirus. It also discusses different filtration technologies using nanofibers to capture these aerosols for short-term filtration, where aerosols are trapped in the filter (depth filtration), and long-term filtration, where aerosols are trapped in the growing filter cake (cake filtration). This book provides a good understanding on how nanofibers, which is of size 1/1000 times that of a normal human hair, can effectively filter these tiny aerosols. NFT, organized in four sections – fundamentals, deep understanding, technologies, and application, covering comprehensively on the subject, is a valuable resource for undergraduates and graduates, engineers, researchers and practitioners in related industries. Describes technologies with insight and use basic engineering principles to build-up technologies Includes extensive clear and understandable figures and tables to enhance key concepts Uses examples throughout to explain engineering principles and interdisciplinary concepts The only book in the market focusing on nanofiber filter technologies for filtering submicron aerosols and nanoaerosols

Author: Helmut Neunzert
Publisher: Springer
ISBN: 3662482584
Category : Mathematics
Languages : en
Pages : 440

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This book offers an insider's view of how industrial problems are translated into mathematics and how solving the mathematics leads to convincing industrial solutions as well. In 6 technical chapters, a wide range of industrial problems is modeled, simulated, and optimized; 4 others describe the modeling, computing, optimization, and data analysis concepts shaping the work of the Fraunhofer ITWM. Each technical chapter illustrates how the relevant mathematics has been adapted or extended for the specific application and details the underlying practical problem and resulting software. The final chapter shows how the use of mathematical modeling in the classroom can change the image of this subject, making it exciting and fun.

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 300

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Author: R.C. Brown
Publisher: Pergamon
ISBN:
Category : Science
Languages : en
Pages : 300

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The need for clean air has probably never been greater. Many industrial employees need to avoid exposure to airborne particulates, while certain industrial processes demand clean air of exceptional quality. Medical and biological fields rely on sterile air, while filtration can improve air quality in offices, homes and all types of transport. Filters act in a variety of complex and subtle ways. Each chapter introduces its subject matter simply, before tackling the problem in greater depth. The book therefore provides an excellent basis for detailed study, but is also invaluable to anyone needing an overview of the subject.

Author: Ian Colbeck
Publisher: John Wiley & Sons
ISBN: 1119977924
Category : Science
Languages : en
Pages : 522

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AEROSOL SCIENCE TECHNOLOGY AND APPLICATIONS Aerosols influence many areas of our daily life. They are at the core of environmental problems such as global warming, photochemical smog and poor air quality. They can also have diverse effects on human health, where exposure occurs in both outdoor and indoor environments. However, aerosols can have beneficial effects too; the delivery of drugs to the lungs, the delivery of fuels for combustion and the production of nanomaterials all rely on aerosols. Advances in particle measurement technologies have made it possible to take advantage of rapid changes in both particle size and concentration. Likewise, aerosols can now be produced in a controlled fashion. Reviewing many technological applications together with the current scientific status of aerosol modelling and measurements, this book includes: Satellite aerosol remote sensing The effects of aerosols on climate change Air pollution and health Pharmaceutical aerosols and pulmonary drug delivery Bioaerosols and hospital infections Particle emissions from vehicles The safety of emerging nanomaterials Radioactive aerosols: tracers of atmospheric processes With the importance of this topic brought to the public's attention after the eruption of the Icelandic volcano Eyjafjallajökull, this book provides a timely, concise and accessible overview of the many facets of aerosol science.

Author: Bin Ding
Publisher: William Andrew
ISBN: 0128134410
Category : Science
Languages : en
Pages : 832

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Electrospinning: Nanofabrication and Applications presents an overview of the electrospinning technique, nanofabrication strategies and potential applications. The book begins with an introduction to the fundamentals of electrospinning, discussing fundamental principles of the electrospinning process, controlling parameters, materials and structures. Nanofabrication strategies, including coaxial electrospinning, multi-needle electrospinning, needleless electrospinning, electro-netting, near-field electrospinning, and three-dimensional macrostructure assembling are also covered. Final sections explore the applications of electrospun nanofibers in different fields and future prospects. This is a valuable reference for engineers and materials scientist working with fibrous materials and textiles, as well as researchers in the areas of nanotechnology, electrospinning, nanofibers and textiles. Explores controllable fabrication of electrospun nanomaterials and their multifunctional applications Explains the electrospinning technique as used in nanofabrication and nanofibers Outlines the applications of electrospun nanofibrous materials in tissue engineering, filtration, oil-water separation, water treatment, food technology, supercapacitors, sensors and so on

Author:
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 1910

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