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Radiative Transfer In Low Density Low Z Foam
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Book Synopsis Radiative Transfer in Low-density, Low-Z Foam by : Gregory A. Rochau
Download or read book Radiative Transfer in Low-density, Low-Z Foam written by Gregory A. Rochau and published by . This book was released on 2003 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cellular and Porous Materials by : Andreas Öchsner
Download or read book Cellular and Porous Materials written by Andreas Öchsner and published by John Wiley & Sons. This book was released on 2008-11-21 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing the reader with a solid understanding of the fundamentals as well as an awareness of recent advances in properties and applications of cellular and porous materials, this handbook and ready reference covers all important analytical and numerical methods for characterizing and predicting thermal properties. In so doing it directly addresses the special characteristics of foam-like and hole-riddled materials, combining theoretical and experimental aspects for characterization purposes.
Book Synopsis Proceedings of the Fifty-first Workshop of the INFN Eloisatron Project by : INFN ELOISATRON Project. Workshop
Download or read book Proceedings of the Fifty-first Workshop of the INFN Eloisatron Project written by INFN ELOISATRON Project. Workshop and published by World Scientific. This book was released on 2010 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book ?Channeling 2008?, Charged and Neutral Particles Channeling Phenomena, is formed by the same title conference contributions. This volume includes papers by leading researchers from different world centers. Their recent results on the coherent phenomena of charged and neutral particles propagating through the structures of various sizes and periodicities are included here, along with historical reviews by pioneers of coherent bremsstrahlung and channeling radiation as well as crystal channeling collimation.
Book Synopsis On the Transparency of Foam in Low-density Foam Z-pinch Experiments by :
Download or read book On the Transparency of Foam in Low-density Foam Z-pinch Experiments written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Foam Z-pinch experiments have been performed on the SATURN and Z machines at Sandia National Laboratories to study physics issues related to x-ray radiation generation and inertial confinement fusion. A significant issue for foam Z-pinch experiments is the transparency of the heated foam as a function of time and wavelength. Foam transparency will be important in future foam Z-pinch experiments both because it influences the time-dependent radiation field seen by an ICF capsule embedded in the foam, and because it is an important factor in making high-resolution spectral measurements of a capsule or tracers embedded in the foam. In this paper, the authors describe results from simulations and experiments which address the issue of foam transparency. They discuss imaging data from one Z experiment in which x-ray emission from a half-Au/half-CH disk located at the bottom of a 1 cm-tall, 14 mg/cc TPX foam is observed. Simulation results predicting CH foam optical depths as a function of plasma conditions are presented. In addition, the authors present results from spectral calculations which utilize 2-D MHD simulation predictions for the time-dependent foam conditions. The results indicate that the observed x-ray framing camera images are consistent with early-time (several ns prior to stagnation) foam electron temperatures of [approx-gt] 30 eV, which is somewhat hotter than the foam electron temperatures predicted from the 2-D MHD simulations at early times.
Book Synopsis Radiative Transfer in Nontransparent, Dispersed Media by : Harald Reiss
Download or read book Radiative Transfer in Nontransparent, Dispersed Media written by Harald Reiss and published by . This book was released on 2014-01-15 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiative Transfer-I by : M. Pinar Mengüç
Download or read book Radiative Transfer-I written by M. Pinar Mengüç and published by Begell House Publishers. This book was released on 1996 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the First International Symposium on Radiative Heat Transfer Includes more than 50 papers on solution methods for the radiative transfer equation, transient radiation problems, radiative properties of gases, inverse radiation problems, modeling of comprehensive systems and more.
Book Synopsis Radiative Transfer Using Boltzmann Transport Theory by : Carnell Littlejohn
Download or read book Radiative Transfer Using Boltzmann Transport Theory written by Carnell Littlejohn and published by Universal-Publishers. This book was released on 2004-12-16 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiative transfer of photons though a random distribution of scatterers is considered. The Boltzmann transport eq is used to develop a program to obtain real values of intensity based on a set of discrete time intervals. A Newton-Raphson method is used to determine a set of eigenvalues based on the boundary conditions and system geometry. A numerical method due to Lanczos is used to approximately invert a Laplace transform. The algorithm is designed for easy modification to more general problems. PART II: Eigenvalues for the intensity distribution from the one speed Boltzmann transport equation can be computed using an iteration method with the roots and coefficients for the zeros of the Legendre polynomials and the results converge to the known values based on a Newton-Raphson method used in an earlier treatment for a radiative transfer . A spherical harmonic expansion of the intensity and the application of laplace and finite fourier transforms was used to solve the problem . The zero of a transcendental equation based on the differential equation for the boundary conditions was approximated for the eigenvalues . A Newton-Raphson method was used . Here an iteration method is used with the Legendre polynomials and the results are identical to the Newton-Raphson results therefore the Legendre polynomials can be used to compute the eigenvalues for the intensity distribution . A S16 approximation of the intensity distribution using Fast Fourier Transforms for the coefficients of the interpolating polynomial is given . The program for the coefficients is from a standard Numerical Methods text (Burden and Faires, 1993, Chap.8, p. 309). Arctans from the approximation are compared with the Newton-Raphson eigenvalues.
Book Synopsis Thermal Radiation Heat Transfer: Radiation transfer with absorbing, emitting, and scattering media by : Robert Siegel
Download or read book Thermal Radiation Heat Transfer: Radiation transfer with absorbing, emitting, and scattering media written by Robert Siegel and published by . This book was released on 1971 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiative Transfer in Curved Media by : K. K. Sen
Download or read book Radiative Transfer in Curved Media written by K. K. Sen and published by World Scientific. This book was released on 1990 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the methods described in this book can be used with cosmetic modifications to solve transfer problems of greater complexity. All attempts have been made to make the book self-contained.
Book Synopsis Voids in Materials by : Gary M. Gladysz
Download or read book Voids in Materials written by Gary M. Gladysz and published by Elsevier. This book was released on 2020-11-30 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: All materials have voids in them, at some scale. Sometimes the voids are ignored, sometimes they are taken into account, and other times they are the focal point of the research. Voids in Materials: From Unavoidable Defects to Designed Cellular Materials takes due notice of all these occurrences, whether designed or unavoidable defects. We define, categorize, and characterize the voids (or empty spaces in materials) and we analyze the effects they have on material properties. This second edition is an updated and expanded central reference for voids in materials and covers all types of voids, intrinsic and intentional, and stochastic and nonstochastic, and the processes and conditions that are needed to create them and is a valuable resource to students in the areas of mechanical engineering, chemical engineering, materials science and engineering, physics, and chemistry, as well as scientists, researchers, and engineers in industry. the effect of voids in materials; from low volume fraction defects and free volume in polymer networks to high void volume fraction foams and aerogels how and why voids are introduced into materials across the length scales biomaterial design used in vivo for soft, hard, and nerve tissue scaffolds metallic and geopolymeric foams additive manufacturing technologies used to tailor regularity (R) in the cell structure stochastic, nonstochastic, and Voronoi foams the latest techniques for characterizing voids new chapters, covering the Kirkendall effect to create hollow and porous structures, and nanometer scale voids: nanotubes, zeolites, organic frameworks, and nanoporous noble metals
Book Synopsis Radiative Transfer from Solid Materials by : Henry Blau
Download or read book Radiative Transfer from Solid Materials written by Henry Blau and published by . This book was released on 1962 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiative Transfer and Interactions with Conduction and Convection by : M. Necati Özışık
Download or read book Radiative Transfer and Interactions with Conduction and Convection written by M. Necati Özışık and published by Wiley-Interscience. This book was released on 1973 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of the Moscow Physical Society by :
Download or read book Journal of the Moscow Physical Society written by and published by . This book was released on 1998 with total page 422 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 1985 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :1960 Conference on Radiative Transfer from Solid Materials, Boston Publisher : ISBN 13 :9780598418906 Total Pages :270 pages Book Rating :4.4/5 (189 download)
Book Synopsis Radiative Transfer from Solid Materials by : 1960 Conference on Radiative Transfer from Solid Materials, Boston
Download or read book Radiative Transfer from Solid Materials written by 1960 Conference on Radiative Transfer from Solid Materials, Boston and published by . This book was released on with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of Coated Micropowders to Reduce Radiation Heat Transfer in Foam Insulation by : Arlene Lanciani Marge
Download or read book The Use of Coated Micropowders to Reduce Radiation Heat Transfer in Foam Insulation written by Arlene Lanciani Marge and published by . This book was released on 1991 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyurethane foam is the most effective insulation currently available for buildings. Chlorofluorocarbon (CFC) blowing agents, which have low thermal conductivities, contribute highly to the effectiveness of this insulation. However, CFC blowing agents are being phased out because they are depleting the earth's protective ozone layer. Alternate blowing agents, with higher thermal conductivities, will compromise the insulating value of the foam insulation. To counteract this effect, the author has sought to improve the effectiveness of foam insulation by increasing its extinction coefficient. In this work, theoretical analysis and experimental measurements have been used to study and increase the extinction coefficient of polyurethane foam insulation. Radiative heat transfer, which accounts for approximately 25% of the total heat transfer through foams, is inversely proportionate to the extinction coefficient. Foam cell walls presently have a transmissivity of about 80% to infrared radiation. The extinction coefficient of foams can be improved by decreasing the cell sizes or by increasing the absorptivity of the foam cell walls. The approach of this work has been to increase the cell wall opacity through the addition of opaque micropowders. Conduction through the solid polymer is of the same magnitude as the radiative transfer, also accounting for approximately 25% of the heat transfer of the foam. To maintain the low thermal conductivity of the polymer, the micropowders added to reduce radiative transfer through the foam must not change its characteristic conductivity. Polymer micropowders with thermally opaque coatings of graphite have been developed in this work using core micropowders with diameters between 8 and 30 [mu]m. Theory predicts that the smaller the particle size, the larger the resulting improvement in extinction coefficient. The coatings required for opacity are less than 0.1 [mu]m thick, composing less than 7% of the overall volume of the powder. The extinction coefficients of the coated micropowders have been experimentally derived and agree well with analytical predictions. These coated micropowders have been added to foams with the goal of increasing their extinction coefficients. The resulting foams indeed demonstrate improved extinction coefficients when compared to a powderless control foam. This improvement results both from reduction in cell size and increased cell wall opacity. The resulting effective conductivities of the foams have been decreased by as much as 6% through the addition of these relatively large micropowders. These results correlate well with predicted values and indicate that the addition of smaller particles will result in even more improvement.