Hybrid S{sub N}/Monte Carlo research and results
The neutral particle transport equation is solved by a hybrid method that iteratively couples regions where deterministic (S{sub N}) and stochastic (Monte Carlo) methods are applied. The Monte Carlo and S{sub N} regions are fully coupled in the sense that no assumption is made about geometrical separation or decoupling. The hybrid Monte Carlo/S{sub N} method provides a new means of solving problems involving both optically thick and optically thin regions that neither Monte Carlo nor S{sub N} is well suited for by themselves. The hybrid method has been successfully applied to realistic shielding problems. The vectorized Monte Carlo algorithm in the hybrid method has been ported to the massively parallel architecture of the Connection Machine. Comparisons of performance on a vector machine (Cray Y-MP) and the Connection Machine (CM-2) show that significant speedups are obtainable for vectorized Monte Carlo algorithms on massively parallel machines, even when realistic problems requiring variance reduction are considered. However, the architecture of the Connection Machine does place some limitations on the regime in which the Monte Carlo algorithm may be expected to perform well.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10154521
- Report Number(s):
- LA-UR-93-1392; CONF-9304131-2; ON: DE93012677
- Resource Relation:
- Conference: Advanced Monte Carlo computer programs for radiation transport,Saclay (France),27-29 Apr 1993; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Implementation of a Monte Carlo algorithm for neutron transport on a massively parallel SIMD machine
Implementation of a Monte Carlo algorithm for neutron transport on a massively parallel SIMD machine
Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
NEUTRAL-PARTICLE TRANSPORT
MONTE CARLO METHOD
ITERATIVE METHODS
ALGORITHMS
ARRAY PROCESSORS
PERFORMANCE
COMPARATIVE EVALUATIONS
663620
990200
PHYSICS OF RADIATIONS OTHER THAN NEUTRONS
MATHEMATICS AND COMPUTERS