TY - GEN
T1 - Computational cost and accuracy comparison of radiation solvers with emphasis on combustion simulations
AU - Roy, S. P.
AU - Cai, J.
AU - Ge, W.
AU - Modest, M. F.
N1 - Publisher Copyright:
© 2021, Begell House Inc. All rights reserved.
PY - 2015
Y1 - 2015
N2 - A systematic comparison of cost and accuracy of three types of RTE solvers – photon Monte Carlo (PMC), discrete ordinates, and spherical harmonics – were carried out on an artificial optically-intermediate nonpremixed turbulent jet flame. Up to 16 polar and 32 azimuthal ordinates for discrete ordinates, up to the seventh-order of spherical harmonics (PN) method, and third-and fifth-order simplified spherical harmonics (SPN) methods were used in the current study. The PMC solver was used for benchmarking all other solvers. The discrete ordinate method (DOM) solver converged at as low as four polar and azimuthal ordinates. The PN solver, on the other hand, showed rapid increase in accuracy with increase in order. Computational cost of the PN method increases quadratically with its order, whereas cost increase was found to be linear with increase in ordinate resolution for DOM. Computational memory requirement for DOM was found to be higher than for PN and is expected to become a bottleneck in complex combustion simulations.
AB - A systematic comparison of cost and accuracy of three types of RTE solvers – photon Monte Carlo (PMC), discrete ordinates, and spherical harmonics – were carried out on an artificial optically-intermediate nonpremixed turbulent jet flame. Up to 16 polar and 32 azimuthal ordinates for discrete ordinates, up to the seventh-order of spherical harmonics (PN) method, and third-and fifth-order simplified spherical harmonics (SPN) methods were used in the current study. The PMC solver was used for benchmarking all other solvers. The discrete ordinate method (DOM) solver converged at as low as four polar and azimuthal ordinates. The PN solver, on the other hand, showed rapid increase in accuracy with increase in order. Computational cost of the PN method increases quadratically with its order, whereas cost increase was found to be linear with increase in ordinate resolution for DOM. Computational memory requirement for DOM was found to be higher than for PN and is expected to become a bottleneck in complex combustion simulations.
UR - http://www.scopus.com/inward/record.url?scp=85075246005&partnerID=8YFLogxK
U2 - 10.1615/ICHMT.2015.IntSympAdvComputHeatTransf.1460
DO - 10.1615/ICHMT.2015.IntSympAdvComputHeatTransf.1460
M3 - Conference contribution
AN - SCOPUS:85075246005
SN - 9781567004298
T3 - International Symposium on Advances in Computational Heat Transfer
SP - 1493
EP - 1510
BT - Proceedings of CHT-15
PB - Begell House Inc.
T2 - 6th International Symposium on Advances in Computational Heat Transfer , CHT 2015
Y2 - 25 May 2015 through 29 May 2015
ER -