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COMPARISON BETWEEN PERFORMANCES OF MONTE CARLO METHOD AND METHOD OF LINES SOLUTION OF DISCRETE ORDINATES METHOD

DOI: 10.1615/ICHMT.2004.RAD-4.90
9 pages

Gokmen Demirkaya
Department of Mechanical Engineering, Middle East Technical University 06531 Ankara, TURKEY

Faruk Arinc
Mechanical Engineering Department, Middle East Technical University; International Centre for Heat and Mass Transfer (ICHMT), Ankara, Turkey

Nevin Selcuk
Chemical Engineering Department, Middle East Technical University, 06531 Ankara, Turkey

Isil Ayranci
Department of Chemical Engineering, Middle East Technical University, 06531 Ankara, TURKEY; Centre de Thermique de Lyon (CETHIL CNRS-INSA Lyon-UCBL), Bât. Sadi Carnot, INSA-Lyon, F-69621, France

Resumo

In this study, Monte Carlo method was used to predict the incident radiative heat fluxes on the freeboard walls of the METU 0.3 MWt atmospheric bubbling fluidized bed combustor based on the data reported previously. The freeboard was treated as a rectangular enclosure with grey interior walls and grey, absorbing, emitting, and isotropically scattering medium. A Monte Carlo solver was developed, and the performance of the solver was assessed by comparing its predictions with those of method of lines solution of discrete ordinates method and experimental measurements reported previously. Parametric studies were carried out to examine the effects of particle load and anisotropic scattering on the predicted incident radiative heat fluxes. The comparisons show that Monte Carlo method reproduces the measured incident radiative heat fluxes reasonably well for the freeboard problem.

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