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Author : Milad Fatenejad
Publisher :
ISBN 13 :
Total Pages : 167 pages
Book Rating : 4.:/5 (733 download)
Download or read book Improved Computational Methods for Simulating Inertial Confinement Fusion written by Milad Fatenejad and published by . This book was released on 2010 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1986-11 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309270626
Total Pages : 119 pages
Book Rating : 4.3/5 (92 download)
Download or read book Assessment of Inertial Confinement Fusion Targets written by National Research Council and published by National Academies Press. This book was released on 2013-07-17 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the fall of 2010, the Office of the U.S. Department of Energy's (DOE's) Secretary for Science asked for a National Research Council (NRC) committee to investigate the prospects for generating power using inertial confinement fusion (ICF) concepts, acknowledging that a key test of viability for this concept-ignition -could be demonstrated at the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) in the relatively near term. The committee was asked to provide an unclassified report. However, DOE indicated that to fully assess this topic, the committee's deliberations would have to be informed by the results of some classified experiments and information, particularly in the area of ICF targets and nonproliferation. Thus, the Panel on the Assessment of Inertial Confinement Fusion Targets ("the panel") was assembled, composed of experts able to access the needed information. The panel was charged with advising the Committee on the Prospects for Inertial Confinement Fusion Energy Systems on these issues, both by internal discussion and by this unclassified report. A Panel on Fusion Target Physics ("the panel") will serve as a technical resource to the Committee on Inertial Confinement Energy Systems ("the Committee") and will prepare a report that describes the R&D challenges to providing suitable targets, on the basis of parameters established and provided to the Panel by the Committee. The Panel on Fusion Target Physics will prepare a report that will assess the current performance of fusion targets associated with various ICF concepts in order to understand: 1. The spectrum output; 2. The illumination geometry; 3. The high-gain geometry; and 4. The robustness of the target design. The panel addressed the potential impacts of the use and development of current concepts for Inertial Fusion Energy on the proliferation of nuclear weapons information and technology, as appropriate. The Panel examined technology options, but does not provide recommendations specific to any currently operating or proposed ICF facility.
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309057787
Total Pages : 63 pages
Book Rating : 4.3/5 (9 download)
Download or read book Review of the Department of Energy's Inertial Confinement Fusion Program written by National Research Council and published by National Academies Press. This book was released on 1997-04-24 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Britton Jeffrey Olson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (841 download)
Download or read book Large-eddy Simulation of Multi-material Mixing and Over-expanded Nozzle Flow written by Britton Jeffrey Olson and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulent flows involving the interaction of shock waves and density variations are present in diverse areas of science and engineering. Inertial confinement fusion (ICF), for example, is a theoretical technology which could lead to clean, inexpensive energy for thousands of years to come. The implications of ICF are enormous as are the engineering challenges associated with it. One primary obstacle is modeling and avoiding the hydrodynamic instabilities which grow on the surface of the ICF capsule and which can prevent fusion from occurring. The commercialization of space exploration and privately owned satellites has led to an unprecedented number of orbital launches, which is expected to double each year for the foreseeable future. Modern rocket propulsion systems must become more reliable and efficient to sustain this growth. In the design of the supersonic rocket nozzle, a primary consideration is the avoidance of large flow separation caused by shock waves and the resulting lateral forces or side loads generated. These side loads decrease the lifetime of the nozzle and destabilize the rocket. Due to the complexity of this physical process and the extreme conditions in which it occurs, limited experimental data are available and still much is not understood. Being able to accurately model turbulence and its interaction with shock waves and multi-species mixing has broad impact on these and other problems. In this thesis, numerical simulation is used to model these turbulent interactions in simplified configurations of the two aforementioned applications, ICF and rocket nozzles. Large-eddy Simulation (LES) is used to explore the multi-material mixing processes of the Rayleigh-Taylor instability and the Kelvin-Helmholtz instability. Analysis of the data reveal interesting physics which were not previously documented and which have implications to astrophysical phenomena (type 1a supernovae) and advanced energy technology (ICF). LES is used to simulate an over-expanded planar nozzle which contains a shock wave turbulent boundary layer interaction. A new numerical method for simulating this type of flow is described and tested on a variety of configurations to demonstrate its improved effectiveness and accuracy over previous methods. The LES approach is then used to study the source of shock wave instability in the nozzle. A mechanism is identified and verified by additional simulations and a parametric study of the nozzle configuration. A simple, reduced order model is proposed which captures the shock wave dynamics using a fraction of the computational cost of LES.
Author : Guillermo Velarde
Publisher : CRC Press
ISBN 13 : 1000141985
Total Pages : 784 pages
Book Rating : 4.0/5 (1 download)
Download or read book Nuclear Fusion by Inertial Confinement written by Guillermo Velarde and published by CRC Press. This book was released on 2020-11-25 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear Fusion by Inertial Confinement provides a comprehensive analysis of directly driven inertial confinement fusion. All important aspects of the process are covered, including scientific considerations that support the concept, lasers and particle beams as drivers, target fabrication, analytical and numerical calculations, and materials and engineering considerations. Authors from Australia, Germany, Italy, Japan, Russia, Spain, and the U.S. have contributed to the volume, making it an internationally significant work for all scientists working in the Inertial Confinement Fusion (ICF) field, as well as for graduate students in engineering and physics with interest in ICF.
Author : Thomas J. McCarville
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (89 download)
Download or read book A Numerical Model for Simulating the Dynamic Response of an Inertial Confinement Fusion Cavity Gas to a Target Explosion written by Thomas J. McCarville and published by . This book was released on 1982 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 994 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Scott Martin
Publisher :
ISBN 13 :
Total Pages : 57 pages
Book Rating : 4.:/5 (232 download)
Download or read book Prediction of Inertial Confinement Fusion Chamber Gas Evolution Using Multi-species Computational Fluid Dynamics written by Robert Scott Martin and published by . This book was released on 2007 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inertial confinement fusion is one of two primary approaches to the production of fusion energy for power generation. Due to the high cost of experimentation for large scale systems such as Laser Inertial Fusion Energy (Laser IFE), the ability to accurately simulate the expected performance using properly validated models is of critical importance. The evolution of the chamber environment from target injection through the generation of fusion energy is a critical issue for the success of Laser IFE. In the research presented, the output of a radiation hydrodynamics code is used as the initial condition for evolving the chamber gas dynamics up until a subsequent target injection. To perform these simulations, our group has developed a 2D/3D-Axisymmetric Navier-Stokes fluids code that includes an additional radiation source term. The work presented here has been to extend this code to include the effects of multiple gas species and higher order mechanisms such as diffusion from the Dufour and Soret effects. Validation of the numerical method is demonstrated in the case of separation of Helium and Xenon gas in a shock wave. It is also shown that the code uses reasonably accurate transport coefficients for He:Xe mixtures based on curve fits produced by the ChemKin preprocessor. Numerical simulations of the Laser IFE configuration using the augmented system track the mixing of the Xe gas in the chamber with cold Xe gas from jets on the wall. Simulations using cold He:Xe mixture jets of varying composition are also investigated.
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309270707
Total Pages : 119 pages
Book Rating : 4.3/5 (92 download)
Download or read book Assessment of Inertial Confinement Fusion Targets written by National Research Council and published by National Academies Press. This book was released on 2013-06-17 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the fall of 2010, the Office of the U.S. Department of Energy's (DOE's) Secretary for Science asked for a National Research Council (NRC) committee to investigate the prospects for generating power using inertial confinement fusion (ICF) concepts, acknowledging that a key test of viability for this concept-ignition -could be demonstrated at the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) in the relatively near term. The committee was asked to provide an unclassified report. However, DOE indicated that to fully assess this topic, the committee's deliberations would have to be informed by the results of some classified experiments and information, particularly in the area of ICF targets and nonproliferation. Thus, the Panel on the Assessment of Inertial Confinement Fusion Targets ("the panel") was assembled, composed of experts able to access the needed information. The panel was charged with advising the Committee on the Prospects for Inertial Confinement Fusion Energy Systems on these issues, both by internal discussion and by this unclassified report. A Panel on Fusion Target Physics ("the panel") will serve as a technical resource to the Committee on Inertial Confinement Energy Systems ("the Committee") and will prepare a report that describes the R&D challenges to providing suitable targets, on the basis of parameters established and provided to the Panel by the Committee. The Panel on Fusion Target Physics will prepare a report that will assess the current performance of fusion targets associated with various ICF concepts in order to understand: 1. The spectrum output; 2. The illumination geometry; 3. The high-gain geometry; and 4. The robustness of the target design. The panel addressed the potential impacts of the use and development of current concepts for Inertial Fusion Energy on the proliferation of nuclear weapons information and technology, as appropriate. The Panel examined technology options, but does not provide recommendations specific to any currently operating or proposed ICF facility.
Author : P. Wilders
Publisher : Elsevier
ISBN 13 : 008053841X
Total Pages : 417 pages
Book Rating : 4.0/5 (85 download)
Download or read book Parallel Computational Fluid Dynamics 2001, Practice and Theory written by P. Wilders and published by Elsevier. This book was released on 2002-04-17 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: ParCFD 2001, the thirteenth international conference on Parallel Computational Fluid Dynamics took place in Egmond aan Zee, the Netherlands, from May 21-23, 2001. The specialized, high-level ParCFD conferences are organized yearly on traveling locations all over the world. A strong back-up is given by the central organization located in the USA http://www.parcfd.org.These proceedings of ParCFD 2001 represent 70% of the oral lectures presented at the meeting. All published papers were subjected to a refereeing process, which resulted in a uniformly high quality.The papers cover not only the traditional areas of the ParCFD conferences, e.g. numerical schemes and algorithms, tools and environments, interdisciplinary topics, industrial applications, but, following local interests, also environmental and medical issues. These proceedings present an up-to-date overview of the state of the art in parallel computational fluid dynamics.
Author : Susanne Pfalzner
Publisher : CRC Press
ISBN 13 : 1420011847
Total Pages : 244 pages
Book Rating : 4.4/5 (2 download)
Download or read book An Introduction to Inertial Confinement Fusion written by Susanne Pfalzner and published by CRC Press. This book was released on 2006-03-02 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Newcomers to the field of inertial confinement fusion (ICF) often have difficulty establishing a clear picture of the overall field. The reason for this is because, while there are many books devoted to special topics within the field, there is none that provides an overview of the field as a whole. An Introduction to Inertial Confinement Fusion fi
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1986-11 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Author : James J. Duderstadt
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.3/5 (91 download)
Download or read book Inertial Confinement Fusion written by James J. Duderstadt and published by John Wiley & Sons. This book was released on 1982 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 614 pages
Book Rating : 4.:/5 ( download)
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1946 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.3/5 (91 download)
Download or read book Fusion Energy Update written by and published by . This book was released on 1986 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Adam Ryan Tableman
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.:/5 (19 download)
Download or read book Kinetic Plasma Simulation: Meeting the Demands of Increased Complexity written by Adam Ryan Tableman and published by . This book was released on 2019 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation concerns the development and use of numerical simulation techniques for studying nonlinear plasma systems in which accurate representations of the electron distribution function are required. The kinetic description of the electrons is accomplished via two different simulation modalities: the code OSHUN, which directly solves the Vlasov-Fokker-Planck (VFP) partial differential equation, and the code OSIRIS, which uses the particle-in-cell (PIC) method including an option for a separate Monte Carlo collision model. The dissertation consists of ten chapters that are based on reprints of refereed publications that describe the development and use of OSHUN and OSIRIS. The increasing complexity of today's computers necessitates an increase in the complexity of software to take full advantage of the available computing resources. This requires that software be engineered properly to ensure correct functioning and to enable more developers to contribute. The dissertation includes examples of the creation --- that is, combining new and novel algorithms with software engineering techniques --- and novel usage of simulation software packages capable of exploiting the power of today's computers to enable new capability and discovery. OSHUN includes relativistic corrections to the Vlasov equation but uses a non-relativistic description for the collision operator. The fields can be advanced in time using the full set of Maxwell's equations explicitly, just the electrostatic fields, or an implicit set of equations that includes Ampere's law without the displacement current. An arbitrary number of spherical harmonics can be included permitting efficient studies of physics when the distribution function is nearly in or far from equilibrium. This can drastically reduce the computational cost when only a few spherical harmonics are required. OSHUN was tested against a variety of problems spanning collisional and collisionless systems including Landau Damping, the two stream instability, Spitzer-Harm, and Epperlein-Haines heat flow coefficients in warm magnetized and unmagnetized plasmas. It was also used to explore how the heat flow in the laser entrance hole could modify Stimulated Raman Backscatter in Inertial Confinement Fusion relevant plasmas. New numerical/algorithmic techniques where implemented in the PIC code OSIRIS. In particular, new software engineering techniques facilitated the addition of an algorithm which uses PIC in the r-z coordinates system with a gridless description in the azimuthal angle \phi. The fields, equations, and current are decomposed into an azimuthal mode, m, expansion. This Quasi-3D description permits 3D simulations at a drastically lower computational cost (approaching the cost of 2D simulations) in systems that exhibit nearly azimuthal (cylindrical) symmetry. This capability was used to examine laser wakefield acceleration (LWFA). It was used to verify scaling laws for LWFA in a nonlinear, self-guide regime. The Quasi-3D algorithm was coupled to an independently developed module in OSIRIS that allows simulation of LWFA in a Lorentz-boosted frame. Doing the calculations in this frame yields a computational savings that scales as gamma^2 (where gamma is the Lorentz boost factor) which typically ranges from 100 to 100,000 in the systems under consideration. These modules required the development of novel field solvers and current deposition algorithms to eliminate a numerical instability called the Numerical Cerenkov Instability (NCI). These were added to OSIRIS using the new software engineering techniques now possible with Fortran 2003. OSIRIS was updated to utilize the Graphics Processing Units (GPUs) present in exascale systems like the Summit supercomputer recently built at the Oak Ridge National Laboratory. A GPU version of OSIRIS was used to examine the interactions of Laser Speckles from Stimulated Raman Scattering (SRS). It was found that speckles can mutually interact via scattering light, plasma waves, or non-thermal electrons transporting from speckles above threshold from SRS. This can trigger SRS in speckles that were below threshold. Efforts towards the ultimate (and ongoing) goal of fully integrating the Quasi-3D, Lorentz-boosted frame, and GPU modules is described. When combined, these modules have the potential speed up 3D laser-plasma simulations by immense factors of a million or more.
