Tomographic Methods in Flow Diagnostics PDF Download

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ISBN:
Category :
Languages : en
Pages : 18

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Author:
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ISBN:
Category :
Languages : en
Pages : 103

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This report documents the work performed for the ''Advanced Tomographic Flow Diagnostics for Opaque Multiphase Fluids'' LDRD (Laboratory-Directed Research and Development) project and is presented as the fulfillment of the LDRD reporting requirement. Dispersed multiphase flows, particularly gas-liquid flows, are industrially important to the chemical and applied-energy industries, where bubble-column reactors are employed for chemical synthesis and waste treatment. Due to the large range of length scales (10−6-101m) inherent in real systems, direct numerical simulation is not possible at present, so computational simulations are forced to use models of subgrid-scale processes, the accuracy of which strongly impacts simulation fidelity. The development and validation of such subgrid-scale models requires data sets at representative conditions. The ideal measurement techniques would provide spatially and temporally resolved full-field measurements of the distributions of all phases, their velocity fields, and additional associated quantities such as pressure and temperature. No technique or set of techniques is known that satisfies this requirement. In this study, efforts are focused on characterizing the spatial distribution of the phases in two-phase gas-liquid flow and in three-phase gas-liquid-solid flow. Due to its industrial importance, the bubble-column geometry is selected for diagnostics development and assessment. Two bubble-column testbeds are utilized: one at laboratory scale and one close to industrial scale. Several techniques for measuring the phase distributions at conditions of industrial interest are examined: level-rise measurements, differential-pressure measurements, bulk electrical impedance measurements, electrical bubble probes, x-ray tomography, gamma-densitometry tomography, and electrical impedance tomography.

Author: Philip Joseph Emmerman
Publisher:
ISBN:
Category :
Languages : en
Pages : 74

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Author: P. Buchhave
Publisher: Springer Science & Business Media
ISBN: 1489912711
Category : Science
Languages : en
Pages : 387

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The origin of optical methods for fluid flow investigations appears to be nontraceable. This is no matter for surprise. After all seeing provides the most direct and common way for humans to learn about their environment. But at the same time some of the most sophisticated methods for doing measurements in fluids are also based on light and often laser light. A very large amount of material has been published in this area over the last two decades. Why then another publication? Well, the field is still in a state of rapid development. It is characterised by the use of results and methods developed within very different areas like optical physics, spectroscopy, communication systems, electronics and computer science, mechanical engineering, chemical engineering and, of course, fluid dynamics. We are not aware of a book containing both introductory and more advanced material that covers the same material as presented here. The book is the result of a compilation and expansion of material presented at a summer school on Optical Diagnosticsfor Flow Processes,held at RiS0 National Laboratory and the Technical University of Denmark in September 1993. The aim of the course was to provide a solid background for understanding, evaluating, and using modem optical diagnostic methods, addressing Ph. D. students and researchers active in areas of fluid flow research. The disciplines represented by the participants ranged from atmospheric fluid dynamics to biomedicine.

Author: David Sanned
Publisher:
ISBN: 9789180398633
Category :
Languages : en
Pages : 0

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Med populärvetenskaplig sammanfattning på svenska.

Author: Bhagwat D. Ahluwalia
Publisher: CRC Press
ISBN: 1000141861
Category : Medical
Languages : en
Pages : 264

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This publication is a compendium of physical principles, system descriptions, instrument quality assurance, and clinical applications of extant tomographic methods in nuclear medicine. Written by an expert in this pertinent field, each chapter deals with the topics in a comprehensive fashion to provide a ready reference of all the work done on the subject and an estimate of the future utilization. Descriptions of methods available to nuclear medicine for tomographic viewing include positron emission, single photon emission, and planar tomography. This is an excellent resource volume of general applicability for nuclear medicine physicians, nuclear medicine scientists, and researchers in organ imaging and processing techniques.

Author: Mohammad Dawood
Publisher: CRC Press
ISBN: 1439812985
Category : Medical
Languages : en
Pages : 304

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Written by an interdisciplinary team of medical doctors, computer scientists, physicists, engineers, and mathematicians, Correction Techniques in Emission Tomography presents various correction methods used in emission tomography to generate and enhance images. It discusses the techniques from a computer science, mathematics, and physics viewpoint. The book gives a comprehensive overview of correction techniques at different levels of the data processing workflow. It covers nuclear medicine imaging, hybrid emission tomography (PET-CT, SPECT-CT, PET-MRI, PET-ultrasound), and optical imaging (fluorescence molecular tomography). It illustrates basic principles as well as recent advances, such as model-based iterative algorithms and 4D methods. An important aspect of the book is on new and sophisticated motion correction techniques in PET imaging. These techniques enable high-resolution, high-quality images, leading to better imaging analysis and image-based diagnostics. Reflecting state-of-the-art research, this volume explores the range of problems that occur in emission tomography. It looks at how the resulting images are affected and presents practical compensation methods to overcome the problems and improve the images.

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 968

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Author: HK Chopra
Publisher: JP Medical Ltd
ISBN: 9352703049
Category : Medical
Languages : en
Pages : 925

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Cardiodiabetes refers to heart disease that develops in people who have diabetes. Compared with people who don't have diabetes, people who have diabetes are at higher risk of heart disease, have additional causes of heart disease, may develop heart disease at a younger age, and may have more severe heart disease. With nearly 1000 pages, this manual is a complete guide to the diagnosis and management of cardiodiabetes. Divided into nine sections, each chapter addresses a separate and distinct issue of clinical relevance. The book provides an insight into clinical spectrum, diagnostic methodology, management strategies, nutraceutical and obesity care, arrhythmia management, coronary intervention, cardiac surgery, rehabilitation, and future directions in cardiodiabetes care. Additionally, the text features discussion on strategies to reduce the growing prevalence of diabetes, and the current pathophysiological understanding of cardiovascular comorbidities in patients with diabetes. More than 500 clinical photographs, illustrations, tables and boxes further enhance the comprehensive text. Key points Nearly 1000 pages providing in depth discussion on diagnosis and management of cardiodiabetes Each chapter addresses a separate issue of clinical relevance Includes future directions in cardiodiabetes care Highly illustrated with more than 500 images, tables and boxes

Author: A Plaskowski
Publisher: CRC Press
ISBN: 9780750302968
Category : Science
Languages : en
Pages : 242

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The first authoritative account of the industrial potential of tomographic imaging techniques, Imaging Industrial Flows: Applications of Electrical Process Tomography provides an overview of the instrumentation used in process tomography. Assuming only a basic knowledge of instrumentation, electronics, and computing systems, the authors concisely describe the principles behind the operation of image reconstruction techniques and the application of electrical tomography to measuring flows in pipelines and other industrial equipment. This reference will help you improve the efficiency of measurement and control equipment, monitor industrial effluents, and increase the efficiency and safety of process plant equipment, in particular, in the chemical engineering, oil technology, and flow measurement instrumentation industries.