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Show equilibrium, conserved scalar pdf model. This work formed the first part of a two step internal project to validate the new unstructured solver against experimental data. Predictions obtained from the unstructured solver are seen to match those from the structured solver very well. Predictions are also seen to be in relatively good agreement with experimental results. Some of the differences seen in comparisons to experimental results are due to modeling the 3-D problem as axisymmetric. This study provided the first step to comprehensive validation of a new tool. The single step chemistry model was observed to be not as accurate or comprehensive with respect to information as the two-step and the pdf models. Therefore, only the two-step chemistry and the pdf models will be analyzed in the second part of the project. The next step will be to simulate the full 3-D problem along with a comparison of the performance of the different combustion models that are available. A full comparison of predicted species concentrations with experimental data will also be carried out. Acknowledgements The author would like to acknowledge the prior work done by Dr. Meriem Makhlouf of Fluent Europe that helped in setting up the current validation problem with ease. The author would also like to thank Andre Peters of Fluent Inc. for helpful discussions. References 1. Sayre, A., Lallemant, N., Dugue, J., and Weber, R., "Scaling Characteristics of Aerodynamics and Low-NOr properties of Industrial Natural Gas Burners, The SCALING 400 Study, Part, IV: The 300 kW BERL Test Results," IFRF Doc No F40/y/11, International Flame Research Foundation, The Netherlands. 2. Weber, R., Peters, A. A. F., Breithaupt, P. P., and Visser, B. M., Mathematical Modeling of Swirling Pulverized Coal Flames: What can Combustion Engineers expect from Modeling. ASME FACT 17, 71. Book No. H00827-1993. 3. Magnussen, B. F. and Hjertager, B. H., On Mathematical Modeling of Turbulent Combustion with Emphasis on Soot Formation and Combustion, Seventeenth Symposium (International) on combustion, The Combustion Institute, (1976). 4. Hutchinson, B.R., and Raithby, G.D., A Multigrid Method based on the Additive Correction STrategy, Num. Heat Transfer, v. 9, pp. 511-537, (1986). 5. Peters, A.A.F, and Weber. R., Mathematical Modeling of a 2.25 MW Swirling Natural Gas Flame. Part 1: Eddy Breakup Concept for Turbulent Combustion; Probability Density Function Approach for Nitric Oxide Formation, Combustion Science and Technology, vols. 110-111, pp. 67-101. (1995) 6. Wild, P.N., and Faltsi-Saravelou, 0., Mathematical Modeling of a 2.25 MW Swirling Natural Gas Flame. Part 2: Conserved Scalar Approach for Turbulent Combustion, Combustion Science and Technology, vols. 110-111, pp. 103-121. (1995) 7. Kaufman, K.C., and Fiveland, W.A., Pilot Scale Data Collection and Burner Model Numerical Code Validation, topical report for GRI contract 5093-260-2729. 6 |