Download or read book Numerical Simulation of Chemical Weapon Detonations written by and published by . This book was released on 1996 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Huntsville Engineering and Support Center, U.S. Army Corps of Engineers, is currently involved in the location, removal, and demilitarization of stockpiled and non-stockpiled chemical munitions. To support the development of safe, efficient, and cost-effective approaches for demilitarizing these weapons, numerical simulations of the detonation of 9 chemical weapons were performed with CTH, an Eulerian hydrocode developed by Sandia National Laboratories. Arena test results were available for 4 of these weapons and comparisons to the CTH predictions showed very good agreement for both blast pressures and fragment velocities. However, as with all currently available numerical codes, fragment size distributions could not be predicted since it is beyond the state-of-the-art. The modeling of one weapon (the 4.7" artillery shell) and the results of the analysis are discussed in this paper. In addition, brief descriptions of the modeling results for the other 8 weapons are given, the development of two new Equation of State models for chemical weapons is discussed, and a brief summary of the lessons learned in performing hydrocode simulation of chemical weapon detonation is provided.
Download or read book An Overview of Numerical Simulation of Chemical Weapon Explosions Using Hydrocodes written by and published by . This book was released on 1996 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Army Engineering and Support Center, Huntsville, U.S. Army Corps of Engineers, is the Army's Mandatory Center of Expertise for the remediation of ordnance and explosive (OE) waste sites. The Center is also the design agency for the Army's Chemical Stockpile Disposal Program. To develop safe and efficient methods for removal of ordnance, the blast and fragment hazards caused by an explosion must be known. Typically, this information has been developed via expensive and timeconsuming arena tests. However, the schedule for an OE remediation project often precludes performing an arena test. Additionally, many chemical weapons already recovered, or that we expect to find, are pre-World War II munitions. No arena test data exists for most of these weapons. The Huntsville Center is investigating the use of hydrocode programs for use in predicting blast pressures and fragmentation from chemical weapons. Hydrocodes are used extensively in modeling explosions, high-velocity impacts, and other phenomena. It is believed that, if correctly used, hydrocodes can provide a fast and cost-effective alternative to arena testing, especially for the complex geometries of chemical weapons. The goal of this effort is to validate hydrocodes for prediction of chemical weapon's blast and fragment effects, and to develop guidelines for performing this type of analysis.
Download or read book Numerical Simulation of Detonation with Detailed Chemical Kinetics Using the Space time Method written by Yuhui Wu and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Modeling of Detonations written by Charles L. Mader and published by . This book was released on 1979 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.
Download or read book Numerical Modeling of Explosives and Propellants Third Edition written by Charles L. Mader and published by CRC Press. This book was released on 2008 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a complete overview of the rapidly emerging field of modeling for explosives and propellants, this updated text imparts a thorough understanding of new computational methods and experimental measuring techniques. The CD-ROM contains FORTRAN and executable computer codes.
Download or read book Numerical Simulation of Detonation Initiation by the Space time Conservation Element and Solution Element Method written by Bao Wang and published by . This book was released on 2010 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: This dissertation is focused on the numerical simulation of the detonation initiation process. The space-time Conservation Element and Solution Element (CESE) method, a novel numerical method for time-accurate solutions of nonlinear hyperbolic equations, is extended to model conservation laws with stiff source terms for the detonation initiation process with multiple-step, finite-rate chemistry. The first part of the dissertation illustrates the numerical framework for unsteady chemically reacting flows by incorporating multiple-step, finite-rate chemical mechanisms using the CESE method. One- and two-dimensional solvers have been developed. Extensive code validation and verification are provided for the one- and two-dimensional CESE solvers. The second part focuses on the numerical investigation of the detonation initiation process. The numerical framework is first applied to the direct initiation of gaseous detonations by a blast wave. One-dimensional cylindrical and spherical direct initiation processes in a hydrogen-oxygen mixture are studied with a twenty-four step chemical reaction model. Structures of unsteady reaction zone are clearly resolved. The competition between heat release rate, front curvature, and unsteadiness is investigated. Detailed wave movements in the detonation wave front show that nonlinear waves play an important role in the reacceleration process and are the key to understanding the detonation failure mechanism. The detonation initiation process by implosion shock is then investigated. Shock focusing and shock interactions in the detonation initiation process are examined. Results show a two-shock implosion system due to the interaction between the reflected primary shock and the imploding contact discontinuity. Oblique detonation is studied for the code verification and validation of the two-dimensional CESE solvers. Stabilized detonation structures are resolved and the length of the induction zone is compared with point ignition test data. Implosion with polygonal shock fronts is then explored. Similar to the findings in the one-dimensional results, pressure histories in the focal region show multiple implosions. This Ph. D. study work applies the very accurate and efficient CESE method to study detonation initiation processes. The resultant solvers are state-of-the-art numerical codes that are ready to be applied to time-accurate solutions of detonation initiation processes. This approach provides a new numerical framework for high-fidelity simulations of detonation initiation.
Download or read book Effects of Nuclear Earth Penetrator and Other Weapons written by National Research Council and published by National Academies Press. This book was released on 2005-10-06 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underground facilities are used extensively by many nations to conceal and protect strategic military functions and weapons' stockpiles. Because of their depth and hardened status, however, many of these strategic hard and deeply buried targets could only be put at risk by conventional or nuclear earth penetrating weapons (EPW). Recently, an engineering feasibility study, the robust nuclear earth penetrator program, was started by DOE and DOD to determine if a more effective EPW could be designed using major components of existing nuclear weapons. This activity has created some controversy about, among other things, the level of collateral damage that would ensue if such a weapon were used. To help clarify this issue, the Congress, in P.L. 107-314, directed the Secretary of Defense to request from the NRC a study of the anticipated health and environmental effects of nuclear earth-penetrators and other weapons and the effect of both conventional and nuclear weapons against the storage of biological and chemical weapons. This report provides the results of those analyses. Based on detailed numerical calculations, the report presents a series of findings comparing the effectiveness and expected collateral damage of nuclear EPW and surface nuclear weapons under a variety of conditions.
Download or read book Numerical Modeling of Explosives and Propellants written by Charles L. Mader and published by CRC Press. This book was released on 2007-10-18 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Major advances, both in modeling methods and in the computing power required to make those methods viable, have led to major breakthroughs in our ability to model the performance and vulnerability of explosives and propellants. In addition, the development of proton radiography during the last decade has provided researchers with a major new experimental tool for studying explosive and shock wave physics. Problems that were once considered intractable – such as the generation of water cavities, jets, and stems by explosives and projectiles – have now been solved. Numerical Modeling of Explosives and Propellants, Third Edition provides a complete overview of this rapidly emerging field, covering basic reactive fluid dynamics as well as the latest and most complex methods and findings. It also describes and evaluates Russian contributions to the experimental explosive physics database, which only recently have become available. This book comes with downloadable resources that contain— · FORTRAN and executable computer codes that operate under Microsoft® Windows Vista operating system and the OS X operating system for Apple computers · Windows Vista and MAC compatible movies and PowerPoint presentations for each chapter · Explosive and shock wave databases generated at the Los Alamos National Laboratory and the Russian Federal Nuclear Centers Charles Mader’s three-pronged approach – through text, computer programs, and animations – imparts a thorough understanding of new computational methods and experimental measuring techniques, while also providing the tools to put these methods to effective use.
Download or read book Physics of Nuclear Explosives written by Dalton BARROSO and published by . This book was released on 2021-02-02 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book (an improved English version of the one published in Portuguese in 2009) deals with topics essential to understanding the physics of nuclear explosives. Prepared based on strictly academic scientific activity, it is intended for those who wish to know more deeply the theory and physical processes involved in nuclear explosions. The main topics covered are: neutronic and criticality (neutron transport); hydrodynamics and thermodynamics at high temperatures and densities; dense and heavy plasmas; opacity and transport of thermal radiation; hydrodynamic theory of chemical detonations; shock waves, dynamic compression of solids, implosions; statistics of fission chain reactions; and inertial confinement fusion (thermonuclear detonations). Three types of explosives are analyzed: Pure fission explosives, the so-called "boosted bombs" (with the introduction of deuterium-tritium into the fissile mass) and thermonuclear explosives. Results of complex numerical and computational simulations (many of which presumably have never been published in the open scientific literature) are presented and discussed.""The Physics of Nuclear Explosives" provides a rather comprehensive account of the physical principles involved in nuclear detonations, including both fission and fusion weapons. The author has broken new ground in presenting the results of his numerical simulations of nuclear detonations and characterizations of particular weapons, such as the W-87 warhead." Steven Aftergood - Federation of American Scientists
Download or read book Numerical Modeling of Explosives and Propellants Second Edition written by Charles L. Mader and published by CRC Press. This book was released on 1997-08-29 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Charles Mader, a leading scientist who conducted theoretical research at Los Alamos National Laboratory for more than 30 years, sets a new standard with this reference on numerical modeling of explosives and propellants. This book updates and expands the information presented in the author's landmark work, Numerical Modeling of Detonations, published in 1979 and still in use today. Numerical Modeling of Explosives and Propellants incorporates the considerable changes the personal computer has brought to numerical modeling since the first book was published, and includes new three-dimensional modeling techniques and new information on propellant performance and vulnerability. Both an introduction to the physics and chemistry of explosives and propellants and a guide to numerical modeling of detonation and reactive fluid dynamics, Numerical Modeling of Explosives and Propellants offers scientists and engineers a complete picture of the current state of explosive and propellant technology and numerical modeling. The book is richly illustrated with figures that support the concepts, and filled with tables for quick access to precise data. The accompanying CD-ROM contains computer codes that are the national standard by which modeling is evaluated. Dynamic material properties data files and animation files are also included. There is no other book available today that offers this vital information.
Download or read book Dynamics of Detonations and Explosions written by and published by AIAA. This book was released on 1991 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physics of the Manhattan Project written by Bruce Cameron Reed and published by Springer. This book was released on 2014-08-20 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of nuclear weapons during the Manhattan Project is one of the most significant scientific events of the twentieth century. This revised and updated 3rd edition explores the challenges that faced the scientists and engineers of the Manhattan Project. It gives a clear introduction to fission weapons at the level of an upper-year undergraduate physics student by examining the details of nuclear reactions, their energy release, analytic and numerical models of the fission process, how critical masses can be estimated, how fissile materials are produced, and what factors complicate bomb design. An extensive list of references and a number of exercises for self-study are included. Links are given to several freely-available spread sheets which users can use to run many of the calculations for themselves.
Download or read book Los Alamos Science written by and published by . This book was released on 2002 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book List of Publications of the U S Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1980 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-05 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Verification and Validation in Scientific Computing written by William L. Oberkampf and published by Cambridge University Press. This book was released on 2010-10-14 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in scientific computing have made modelling and simulation an important part of the decision-making process in engineering, science, and public policy. This book provides a comprehensive and systematic development of the basic concepts, principles, and procedures for verification and validation of models and simulations. The emphasis is placed on models that are described by partial differential and integral equations and the simulations that result from their numerical solution. The methods described can be applied to a wide range of technical fields, from the physical sciences, engineering and technology and industry, through to environmental regulations and safety, product and plant safety, financial investing, and governmental regulations. This book will be genuinely welcomed by researchers, practitioners, and decision makers in a broad range of fields, who seek to improve the credibility and reliability of simulation results. It will also be appropriate either for university courses or for independent study.
Download or read book Proceedings written by and published by . This book was released on 1989 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented in this publication cover special problems in the field of energetic materials, particularly detonation phenomena in solids and liquids. General subject areas include shock-to-detonation transition, time resolved chemistry, initiation modeling, deflagration-to-detonation transition, equation of state and equation of state and performance, composites and emulsions, and composites and emulsions/underwater explosives, reaction zone, detonation wave propagation, hot spots, detonation products, chemistry and compositions, and special initiation.
