Download or read book Exponential Monte Carlo Convergence of a Three Dimensional Discrete Ordinates Solution written by and published by . This book was released on 1999 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent work on obtaining exponential convergence for three-dimensional solutions to the spatially and angularly continuous monoenergetic transport equation with isotropic scattering using the reduced source method was promising. The method, however, used two separate estimates of the scalar flux, a Legendre expansion (in the spatial variables) and a quadrature of the angular flux. This introduced an inconsistency that may have lead to some convergence problems. To remove this inconsistency and provide a fairer test of the combined reduced source/Monte Carlo method, the method was applied to estimate the coefficients of a Legendre expansion of the solution of the discrete ordinates equations. In this case, no supplementary approximations were required.
Download or read book Exponential Monte Carlo Convergence on a Homogeneous Right Parallelepiped Using the Reduced Source Method with Legendre Expansion written by and published by . This book was released on 1999 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: In previous work, exponential convergence of Monte Carlo solutions using the reduced source method with Legendre expansion has been achieved only in one-dimensional rod and slab geometries. In this paper, the method is applied to three-dimensional (right parallelepiped) problems, with resulting evidence suggesting success. As implemented in this paper, the method approximates an angular integral of the flux with a discrete-ordinates numerical quadrature. It is possible that this approximation introduces an inconsistency that must be addressed.
Download or read book Transactions of the American Nuclear Society written by American Nuclear Society and published by . This book was released on 1999 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exponentially convergent Monte Carlo for the One dimensional Transport Equation written by Jacob Ross Peterson and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An exponentially-convergent Monte Carlo (ECMC) method is analyzed using the one-group, one-dimension, slab-geometry transport equation. The method is based upon the use of a linear discontinuous finite-element trial space in position and direction to represent the transport solution. A space-angle h-adaptive algorithm is employed to maintain exponential convergence after stagnation occurs due to in- adequate trial-space resolution. In addition, a biased sampling algorithm is used to adequately converge singular problems. Computational results are presented demonstrating the efficacy of the new approach. We tested our ECMC algorithm against standard Monte Carlo and found the ECMC method to be generally much more efficient. For a manufacture solution the ECMC algorithm was roughly 200 times more effective than the standard Monte Carlo. When considering a highly singular pure attenuation problem, the ECMC method was roughly 4000 times more effective. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/152727
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974-03 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geometrically compatible 3 D Monte Carlo and Discrete ordinates Methods written by and published by . This book was released on 1998 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The purpose of this project was two-fold. The first purpose was to develop a deterministic discrete-ordinates neutral-particle transport scheme for unstructured tetrahedral spatial meshes, and implement it in a computer code. The second purpose was to modify the MCNP Monte Carlo radiation transport code to use adjoint solutions from the tetrahedral-mesh discrete-ordinates code to reduce the statistical variance of Monte Carlo solutions via a weight-window approach. The first task has resulted in a deterministic transport code that is much more efficient for modeling complex 3-D geometries than any previously existing deterministic code. The second task has resulted in a powerful new capability for dramatically reducing the cost of difficult 3-D Monte Carlo calculations.
Download or read book Springer Series in Light Scattering written by Alexander Kokhanovsky and published by Springer. This book was released on 2018-01-17 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent advances in studies of light propagation, scattering, emission and absorption in random media. Many natural and biological media vary randomly in time and space. Examples are terrestrial atmosphere and ocean, biological liquids and tissues to name but a few.
Download or read book A Monte Carlo Method for the Solution of Laplace s Equation in Complicated Three dimensional Geometries written by J. H. Pickles and published by . This book was released on 1976 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Joint International Conference on Mathematical Methods and Supercomputing for Nuclear Applications Saratoga Springs New York October 5 9 1997 written by and published by . This book was released on 1997 with total page 780 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 1982 with total page 1696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of Monte Carlo Simulation for Three Dimensional Flows written by M. Scheurlen and published by . This book was released on 1992 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Monte Carlo technique is outlined for the simulation of the transport of a joint scalar probability density function (pdf). The discretisation of the partial differential equations is based on a finite-volume approximation. The problem of frozen solutions is addressed if the number of stochastic elements is limited. Non-adiabatic boundary conditions are discussed if the energy equation is solved by a Monte Carlo simulation.
Download or read book INIS Atomindex written by and published by . This book was released on 1987 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1986 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Heat Transfer written by Greg F. Naterer and published by CRC Press. This book was released on 2018-05-03 with total page 605 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Heat Transfer, Second Edition provides a comprehensive presentation of intermediate and advanced heat transfer, and a unified treatment including both single and multiphase systems. It provides a fresh perspective, with coverage of new emerging fields within heat transfer, such as solar energy and cooling of microelectronics. Conductive, radiative and convective modes of heat transfer are presented, as are phase change modes. Using the latest solutions methods, the text is ideal for the range of engineering majors taking a second-level heat transfer course/module, which enables them to succeed in later coursework in energy systems, combustion, and chemical reaction engineering.
Download or read book The Physics Problems of Reactor Shielding written by International Atomic Energy Agency and published by . This book was released on 1971 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1993 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
