Monte Carlo simulation methods in moment-based scale-bridging algorithms for thermal radiative-transfer problems

Journal Article · Sun Mar 01 04:00:00 EST 2015 · Journal of Computational Physics

DOI:https://doi.org/10.1016/J.JCP.2014.12.020· OSTI ID:22465600

We present a moment-based acceleration algorithm applied to Monte Carlo simulation of thermal radiative-transfer problems. Our acceleration algorithm employs a continuum system of moments to accelerate convergence of stiff absorption–emission physics. The combination of energy-conserving tallies and the use of an asymptotic approximation in optically thick regions remedy the difficulties of local energy conservation and mitigation of statistical noise in such regions. We demonstrate the efficiency and accuracy of the developed method. We also compare directly to the standard linearization-based method of Fleck and Cummings [1]. A factor of 40 reduction in total computational time is achieved with the new algorithm for an equivalent (or more accurate) solution as compared with the Fleck–Cummings algorithm.

• OSTI ID: 22465600
• Journal Information: Journal of Computational Physics, Journal Name: Journal of Computational Physics Vol. 284; ISSN JCTPAH; ISSN 0021-9991
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
97 MATHEMATICS AND COMPUTING
ABSORPTION
ACCURACY
ALGORITHMS
ASYMPTOTIC SOLUTIONS
COMPUTERIZED SIMULATION
CONVERGENCE
EFFICIENCY
EMISSION
ENERGY CONSERVATION
MONTE CARLO METHOD
RADIANT HEAT TRANSFER
STATISTICS