A Hybrid Spectral Nodal Method for Rectangular Geometry Neutral Particle Transport Modeling

All dates for this event occur in the past.

Scott Lab E141
201 W. 19th Avenue
Columbus, OH 43210
United States

Speaker: Dr. Ricardo C. Barros, Director of the Department of Academic Affairs of the State University of Rio de Janeiro (UERJ), Brazil

Abstract: 

We present a hybrid method combining the Analytical Discrete Ordinates Nodal (ADO-CN) method and the Response Matrix-Constant Nodal (RM-CN) method for solving one-speed X,Y-geometry discrete ordinates transport problems in non-multiplying media. This hybrid method (ADO-RM-CN) aims at exploring the main advantages of both methods: (i) as with the ADO-CN method, the use of

angular quadrature schemes is defined in the semi-interval, which generates eigenvalue problems

whose order is reduced to half of the number of discrete directions; (ii) as with the RM-CN method, it has a good feature to generate numerical results without the need of explicitly determining the homogeneous and particular components of the local general solutions. We show through numerical results  to typical model problems that the offered hybrid ADO-RM-CN code is more efficient than the non-hybrid ADO-CN and RM-CN codes individually. Efficiency in this work is characterized by accuracy of the generated solution, taking into account the running time and memory usage of the computer codes written to implement these methods.

Bio: 

Dr. Ricardo C. Barros is current Director of the Department of Academic Affairs of the State University of Rio de Janeiro (UERJ), Brazil.  He also served as the Director of the Polytechnic Institute (IPRJ) at the State University of Rio de Janeiro (UERJ) in Nova Friburgo (2000-2004 and 2016-2020), Director of the Department for the Graduate Programs at UERJ (2004-2007) and Head of the Department of Computational Modeling at IPRJ (2012-2016). Dr. Barros received the BS degree in Physics from UERJ in 1981.  He later received an MS in Nuclear Engineering from the Federal University of Rio de Janeiro (UFRJ) in 1985, and a Ph.D. in Nuclear Engineering from The University of Michigan in 1990. Dr. Barros was the recipient of the American Nuclear Society's Mark Mills Award, in 1991. His research interest is in efficient computational modeling in classic and non-classic neutral particle transport for radiation shielding and nuclear reactor physics.

Category: Nuclear Seminar
Tag: event