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Modeling The Non Transferred Arc Plasma Torch And Plume For Plasma Processing
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Book Synopsis Modeling the Non-transferred Arc Plasma Torch and Plume for Plasma Processing by : Richard Westhoff
Download or read book Modeling the Non-transferred Arc Plasma Torch and Plume for Plasma Processing written by Richard Westhoff and published by . This book was released on 1992 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 17th International Symposium on Plasma Chemistry by : Javad T. Mostaghimi
Download or read book 17th International Symposium on Plasma Chemistry written by Javad T. Mostaghimi and published by . This book was released on 2005 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Plasma Applications in Materials and Metallurgical Processing by : N. El-Kaddah
Download or read book Thermal Plasma Applications in Materials and Metallurgical Processing written by N. El-Kaddah and published by Minerals, Metals, & Materials Society. This book was released on 1992 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews and presents current research for investigators, users and potential users of thermal plasma technology. A broad range of applications are discussed, including melting and refining, extractive metallurgy, plasma spraying, composite materials processing, and plasma synthesis of materials.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Fluid Model for DC Arc Plasma Torches and Its Integration with Downstream Models of Atmospheric Plasma Spray Particle Plumes by : Michael J. Cannamela
Download or read book Development of a Fluid Model for DC Arc Plasma Torches and Its Integration with Downstream Models of Atmospheric Plasma Spray Particle Plumes written by Michael J. Cannamela and published by . This book was released on 2013 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The plasma spray process uses plasma flames to melt micron sized particles of e.g. ceramic and propel the droplets to impinge upon and freeze to the target workpiece, forming a functional coating. Variations in the process arise from many sources, and because sensing of the process is imperfect one is motivated to pursue a modeling approach. This dissertation models the major elements of the process; the torch that produces the plasma flame, the jet of hot plasma issuing from the torch, and the plume of particles conveyed and heated by the jet. The plasma in the torch is modeled by a one-fluid magnetohydrodynamic (MHD) approach and it is found that the MHD equations can accurately predict the power dissipated in the bulk of the plasma, while special treatment is required in regions near the electrodes. Treatment of the cathode region is eased since it can be de-coupled from the bulk flow. Treatment of the anode region aims to extract the correct amount of power from the plasma. With MHD in the bulk and these special conditions at the electrode boundaries, the net power into the plasma can be matched with experiment. For one simulation of an SG-100 torch operating at 500A, the measured net power was 7.0kW while the computed net power was 7.1kW. Using outlet information from the torch, the impact of plasma arc oscillations on the free jet and on the in-flight particle states is predicted. The model of the plasma jet is validated against the existing LAVA code, and is able to predict the fraction of entrained air in the jet to within 20% of the experimental value. The variations in particle states due to the arc fluctuations are found to be similar in size to variations due to changes in particle injection velocity, and so cannot be neglected when considering particle state distributions. The end result of this work is to make available a complete chain of models for the plasma spray process, from torch input conditions to in-flight particle state.
Book Synopsis Numerical Simulation of a Multicomponent Non-transferred Constricted Direct Current Arc with a Supersonic Plama Jet by : Camille George
Download or read book Numerical Simulation of a Multicomponent Non-transferred Constricted Direct Current Arc with a Supersonic Plama Jet written by Camille George and published by . This book was released on 1998 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Plasma Processing and Synthesis of Materials by : Diran Apelian
Download or read book Plasma Processing and Synthesis of Materials written by Diran Apelian and published by . This book was released on 1987 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1992 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Encyclopedia of Plasma Technology - Two Volume Set by : J. Leon Shohet
Download or read book Encyclopedia of Plasma Technology - Two Volume Set written by J. Leon Shohet and published by CRC Press. This book was released on 2016-12-12 with total page 1654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical plasmas have a wide range of industrial applications. The Encyclopedia of Plasma Technology covers all aspects of plasma technology from the fundamentals to a range of applications across a large number of industries and disciplines. Topics covered include nanotechnology, solar cell technology, biomedical and clinical applications, electronic materials, sustainability, and clean technologies. The book bridges materials science, industrial chemistry, physics, and engineering, making it a must have for researchers in industry and academia, as well as those working on application-oriented plasma technologies. Also Available Online This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail) [email protected] International: (Tel) +44 (0) 20 7017 6062; (E-mail) [email protected]
Book Synopsis Light Metals 2024 by : Samuel Wagstaff
Download or read book Light Metals 2024 written by Samuel Wagstaff and published by Springer Nature. This book was released on 2024 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zusammenfassung: The Light Metals symposia at the TMS Annual Meeting & Exhibition present the most recent developments, discoveries, and practices in primary aluminum science and technology. The annual Light Metals volume has become the definitive reference in the field of aluminum production and related light metal technologies. The 2024 collection includes contributions from the following symposia: · Alumina & Bauxite · Aluminum Alloys: Development and Manufacturing · Aluminum Reduction Technology · Electrode Technology for Aluminum Production · Melt Processing, Casting and Recycling · Scandium Extraction and Use in Aluminum Alloys
Book Synopsis Materials Processing in the Computer Age by : Vaughan R. Voller
Download or read book Materials Processing in the Computer Age written by Vaughan R. Voller and published by Minerals, Metals, & Materials Society. This book was released on 1991 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Finite Element Modeling of Flow Instabilities in Arc Plasma Torches by : Juan Pablo Trelles
Download or read book Finite Element Modeling of Flow Instabilities in Arc Plasma Torches written by Juan Pablo Trelles and published by . This book was released on 2013 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The further development of thermal plasma technologies has been limited by the incomplete understanding of instabilities occurring when a confined electric arc interacts with a flow of processing gas. Particularly, plasma spraying, one of the most versatile and widely used spray technologies, suffers from occasional lack of reproducibility due to the partial comprehension of the arc dynamics inside the torch. This research is motivated by the need to obtain fundamental knowledge of the dynamics of the arc inside a plasma torch due to its interaction with a flow of processing gas, and to improve thermal plasma processes in which the flow instabilities preclude their control and uniformity. This thesis presents the development and implementation of two models capable of describing the dynamic arc behavior inside plasma torches; one based on the Local Thermodynamic Equilibrium (LTE) assumption and another based on a more complete description of the plasma that allows partial kinetic equilibration between electrons and heavy particles (Non-LTE or NLTE). The fluid and electromagnetic equations describing both models are approximated numerically in a fully-coupled approach by a Variational Multi-scale Finite Element Method (VMS-FEM), which implicitly accounts for the multi-scale nature of the plasma flow and is promising for the modeling of complex multi-physics and multi-scale phenomena. The solution of the discrete system arising from the VMS-FEM formulation is obtained by a fully-implicit predictor multi-corrector time integrator together with a globalized Newton-Krylov method. The models are applied to the three-dimensional and time-dependent simulation of flow instabilities inside a commercial arc plasma torch typically used in plasma spraying processes, operating with argon and argon-helium. A reattachment model is developed to mimic the physical process by which the arc forms a new attachment under certain operating conditions. A detailed comparison between the results from the NLTE and LTE models is presented, and the role of instabilities on the arc dynamics is elucidated. In contrast to the LTE model, the NLTE model did not need a separate reattachment model to produce the arc reattachment process. The non-equilibrium results show large non-equilibrium zones in the plasma - cold-flow interaction region and close to the anode surface. Marked differences in the arc dynamics, especially in the arc reattachment process, and in the magnitudes of the total voltage drop and outlet temperatures and velocities between the models are observed. The non-equilibrium results show improved agreement with experimental observations.
Download or read book ISIJ International written by and published by . This book was released on 1990 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Thermal Plasmas by : Maher I. Boulos
Download or read book Handbook of Thermal Plasmas written by Maher I. Boulos and published by Springer Nature. This book was released on 2023-02-20 with total page 1973 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative reference presents a comprehensive review of the evolution of plasma science and technology fundamentals over the past five decades. One of this field’s principal challenges has been its multidisciplinary nature requiring coverage of fundamental plasma physics in plasma generation, transport phenomena under high-temperature conditions, involving momentum, heat and mass transfer, and high-temperature reaction kinetics, as well as fundamentals of material science under extreme conditions. The book is structured in five distinct parts, which are presented in a reader-friendly format allowing for detailed coverage of the science base and engineering aspects of the technology including plasma generation, mathematical modeling, diagnostics, and industrial applications of thermal plasma technology. This book is an essential resource for practicing engineers, research scientists, and graduate students working in the field.
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1963 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Energy written by Yatish T. Shah and published by CRC Press. This book was released on 2018-01-12 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book details sources of thermal energy, methods of capture, and applications. It describes the basics of thermal energy, including measuring thermal energy, laws of thermodynamics that govern its use and transformation, modes of thermal energy, conventional processes, devices and materials, and the methods by which it is transferred. It covers 8 sources of thermal energy: combustion, fusion (solar) fission (nuclear), geothermal, microwave, plasma, waste heat, and thermal energy storage. In each case, the methods of production and capture and its uses are described in detail. It also discusses novel processes and devices used to improve transfer and transformation processes.
Book Synopsis Heat Transfer in Thermal Plasma Processing by : K. Etemadi
Download or read book Heat Transfer in Thermal Plasma Processing written by K. Etemadi and published by . This book was released on 1991 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: