Download or read book Acceleration and Deceleration Phase Nonlinear Rayleigh Taylor Growth at Spherical Interfaces written by and published by . This book was released on 2005 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Layzer model for the nonlinear evolution of bubbles in the Rayleigh-Taylor instability has recently been generalized to the case of spherically imploding interfaces [D.S. Clark and M. Tabak, to appear, PRE (2005).]. The spherical case is more relevant to, e.g., inertial confinement fusion or various astrophysical phenomena when the convergence is strong or the perturbation wavelength is comparable to the interface curvature. Here, the model is further extended to the case of bubble growth during the deceleration (stagnation) phase of a spherical implosion and to the growth of spikes during both the acceleration and deceleration phases. Differences in the nonlinear growth rates for both bubbles and spikes are found when compared with planar results. The model predictions are verified by comparison with numerical hydrodynamics simulations.
Download or read book Rayleigh Taylor Instability at Spherical Interfaces of Incompressible Fluids Project Supported by the National Natural Science Foundation of China Grant Nos 11275031 11475034 11575033 11574390 and 11274026 and the National Basic Research Program of China Grant Nos 2013CB834100 and 2013CBA01504 written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : Rayleigh-Taylor instability (RTI) of three incompressible fluids with two interfaces in spherical geometry is derived analytically. The growth rate on the two interfaces and the perturbation feedthrough coefficients between two spherical interfaces are derived. For low-mode perturbation, the feedthrough effect from outer interface to inner interface is much more severe than the corresponding planar case, while the feedback from inner interface to the outer interface is smaller than that in planar geometry. The low-mode perturbations lead to the pronounced RTI growth on the inner interface of a spherical shell that are larger than the cylindrical and planar results. It is the low-mode perturbation that results in the difference between the RTI growth in spherical and cylindrical geometry. When the mode number of the perturbation is large enough, the results in cylindrical geometry are recovered.
Download or read book Hydrodynamic Instabilities and Turbulence written by Ye Zhou and published by Cambridge University Press. This book was released on 2024-05-31 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive reference guide to turbulent mixing driven by Rayleigh-Taylor, Richtmyer-Meshkov and Kelvin-Helmholtz instabilities.
Download or read book The Physics of Inertial Fusion written by Stefano Atzeni and published by Oxford University Press on Demand. This book was released on 2004-06-03 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is on fusion energy, burning hydrogen which is available from water. It is the energy source of the sun. It produces neither greenhouse gases leading to global warming nor long-lived nuclear waste. Here we describe how to use powerful lasers to ignite the hydrogen fuel. There are presently two large laser facilities under construction to demonstrate that this method works. This book is about the physics of this future energy source and addresses people who work on it or want to understand its technical basis.
Download or read book Inertial Confinement Fusion Driven Thermonuclear Energy written by Bahman Zohuri and published by Springer. This book was released on 2017-01-26 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book takes a holistic approach to plasma physics and controlled fusion via Inertial Confinement Fusion (ICF) techniques, establishing a new standard for clean nuclear power generation. Inertial Confinement Fusion techniques to enable laser-driven fusion have long been confined to the black-box of government classification due to related research on thermonuclear weapons applications. This book is therefore the first of its kind to explain the physics, mathematics and methods behind the implosion of the Nd-Glass tiny balloon (pellet), using reliable and thoroughly referenced data sources. The associated computer code and numerical analysis are included in the book. No prior knowledge of Laser Driven Fusion and no more than basic background in plasma physics is required.
Download or read book Hydrodynamic Instabilities in Inertial Confinement Fusion written by Samuel Carl Miller and published by . This book was released on 2022 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Performance degradation in laser direct-drive (LDD) inertial confinement fusion (ICF) implosions is caused by several effects, including Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) hydrodynamic instability growth. RT instability growth occurs in both the acceleration and deceleration phases of implosions. The first half of this thesis examines the evolution of internal perturbations that create seeds for instability growth during shock-transit (or early-time), while the second half describes the perturbation evolution during shell deceleration. During shock-transit, perturbations from shell material density modulations and isolated defects plant seeds at various interfaces such as the ablation front and material interfaces. These seeds can become amplified due to secular feedout growth and shock-induced vorticity and will grow exponentially during the acceleration phase due to ablative RT. A comprehensive understanding of this evolution is essential to characterize the impact of internal defects on inflight shell integrity. Through detailed simulations and analysis, this thesis identifies several key physical processes that play a role in the evolution of perturbations created by these defects throughout the early stage of implosions. Simulations also predict that significant shell mass modulations develop during shell acceleration. The use of low density ablator materials (foam) is suggested as a potential mitigation strategy to reduce the effects created by these defects. To perform this detailed study of internal defect evolution, two new high-fidelity physics codes were developed to track characteristic wave propagation in the ICF context using low-noise, low-dissipation, high-order spatial accuracy solution methods. Modern high performance computing (HPC) systems have becoming increasingly complex, and adapting existing or new software to fully utilize them is a significant development challenge. Each code in this thesis examines the feasibility of different approaches: a modern design in a well-known HPC-centric language (Fortran), and a new language (Julia), which emphasizes developer productivity and shows the potential to be well-suited for HPC workloads. Mass modulations at the ablation front, which grow during the acceleration phase, feed through to the inner surface of the shell and create seeds for deceleration phase RT growth at the inner surface. Deceleration instability growth was studied using laser direct drive implosions of room-temperature plastic targets. Perturbation growth in such implosions is enhanced by the density discontinuity and finite Atwood number at the fuel-shell interface. The magnitude of this density discontinuity can be controlled by changing the fuel composition (D:T, or ratio of deuterium to tritium). However, this thesis demonstrates that the stability of the interface is best characterized by the effective Atwood number, which is primarily determined by material densities at distances on the order of perturbation wavelength on either side of the interface, rather than the density ratio at the interface. Since the densities at these distances are defined not by fuel composition, but radiation heating of the shell, both simulation and experimental data show that target performance is insensitive to different D:T ratios"--Pages ix -x
Download or read book The Effect of the Density Ratio on the Nonlinear Dynamics of the Unstable Fluid Interface written by S. I. Abarzhi and published by . This book was released on 2003 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: When a light fluid accelerates a heavy fluid, the misalignment of the pressure and density gradients gives rise to the instability of the interface, and produces eventually the turbulent mixing of the fluids (Rayleigh 1892; Davies & Taylor 1950; Richtmyer 1960; Meshkov 1969). This phenomenon is called the Rayleigh-Taylor instability (RTI) if the acceleration is sustained, and the Richtmyer-Meshkov instability (RMI) if the acceleration is driven by a shock or if it is impulsive. The RT/RM turbulent mixing is of extreme importance in astrophysics, inertial confinement fusion, and many other applications (Sharp 1984). To obtain a reliable description of the mixing process, the evolution of a largescale coherent structure, the dynamics of small-scale structures, and the cascades of energy should be understood.
Download or read book JJAP written by and published by . This book was released on 1996 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlas of Visualization written by and published by . This book was released on 1993 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Japanese Journal of Applied Physics written by and published by . This book was released on 1996 with total page 1096 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1986 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Energy Density Physics written by R Paul Drake and published by Springer. This book was released on 2018-01-02 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: The raw numbers of high-energy-density physics are amazing: shock waves at hundreds of km/s (approaching a million km per hour), temperatures of millions of degrees, and pressures that exceed 100 million atmospheres. This title surveys the production of high-energy-density conditions, the fundamental plasma and hydrodynamic models that can describe them and the problem of scaling from the laboratory to the cosmos. Connections to astrophysics are discussed throughout. The book is intended to support coursework in high-energy-density physics, to meet the needs of new researchers in this field, and also to serve as a useful reference on the fundamentals. Specifically the book has been designed to enable academics in physics, astrophysics, applied physics and engineering departments to provide in a single-course, an introduction to fluid mechanics and radiative transfer, with dramatic applications in the field of high-energy-density systems. This second edition includes pedagogic improvements to the presentation throughout and additional material on equations of state, heat waves, and ionization fronts, as well as problem sets accompanied by solutions.
Download or read book Trends in Quantum Electronics written by A.M. Prokhorov and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second International Conference on Trends in Quantum Electron ics (TQE'85) was held in Bucharest at the National Centre for Physics in September 1985, and brought together more than 350 scientists from 22 countries. In accordance with the objectives established at the first conference, which was held in 1982 in conjunction with the third International Summer School in Coherent Optics, the second conference con centrated upon the central topics and chief directions of development in quantum electronics - which stands out as an area of science and technology that is currently expanding vigorously. On the other hand, it was also apparent that TQE'85 was primarily influenced by the worldwide celebration, in 1985, of the 25th anniversary of the laser - a moment of prime importance in the development of many frontline fields, including communications, chemistry, biology, health care and materials processing. A special session was devoted to this anniversary. In keeping with the dynamic spirit of the conference, the fine quality of the invited lectures and the other contributions set a high scientific standard for the proceedings. Mention should be made of the posters that were presented throughout the conference. These, together with the exhibition of books and journals and a display of specialized scientific equipment, did much to create a framework for effective communication and stimulating interaction, to the benefit of all the participants. Of invaluable help in the preparation of the conference was the collaboration of the International Scientific Advisory Committee.
Download or read book The Physics of Inertial Fusion written by Stefano Atzeni and published by OUP Oxford. This book was released on 2004-06-03 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is on inertial confinement fusion, an alternative way to produce electrical power from hydrogen fuel by using powerful lasers or particle beams. It involves the compression of tiny amounts (micrograms) of fuel to thousand times solid density and pressures otherwise existing only in the centre of stars. Thanks to advances in laser technology, it is now possible to produce such extreme states of matter in the laboratory. Recent developments have boosted laser intensities again with new possibilities for laser particle accelerators, laser nuclear physics, and fast ignition of fusion targets. This is a reference book for those working on beam plasma physics, be it in the context of fundamental research or applications to fusion energy or novel ultra-bright laser sources. The book combines quite different areas of physics: beam target interaction, dense plasmas, hydrodynamic implosion and instabilities, radiative energy transfer as well as fusion reactions. Particular attention is given to simple and useful modelling, including dimensional analysis and similarity solutions. Both authors have worked in this field for more than 20 years. They want to address in particular those teaching this topic to students and all those interested in understanding the technical basis.
Download or read book Digest of Technical Papers written by American Physical Society and published by . This book was released on 1986 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 1994 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Plasma Physics written by R.J Goldston and published by CRC Press. This book was released on 2020-07-14 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Plasma Physics is the standard text for an introductory lecture course on plasma physics. The text’s six sections lead readers systematically and comprehensively through the fundamentals of modern plasma physics. Sections on single-particle motion, plasmas as fluids, and collisional processes in plasmas lay the groundwork for a thorough understanding of the subject. The authors take care to place the material in its historical context for a rich understanding of the ideas presented. They also emphasize the importance of medical imaging in radiotherapy, providing a logical link to more advanced works in the area. The text includes problems, tables, and illustrations as well as a thorough index and a complete list of references.
