PMID- 16833293 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20070717 LR - 20210208 IS - 1089-5639 (Print) IS - 1089-5639 (Linking) VI - 109 IP - 43 DP - 2005 Nov 3 TI - Local and global uncertainty analyses of a methane flame model. PG - 9795-807 AB - Local and global uncertainty analyses of a flat, premixed, stationary, laminar methane flame model were carried out using the Leeds methane oxidation mechanism at lean (phi = 0.70), stoichiometric (phi = 1.00), and rich (phi = 1.20) equivalence ratios. Uncertainties of laminar flame velocity, maximal flame temperature, and maximal concentrations of radicals H, O, OH, CH, and CH(2) were investigated. Global uncertainty analysis methods included the Morris method, the Monte Carlo analysis with Latin hypercube sampling, and an improved version of the Sobol' method. Assumed probability density functions (pdf's) were assigned to the rate coefficients of all the 175 reactions and to the enthalpies of formation of the 37 species. The analyses provided the following answers: approximate pdf's and standard deviations of the model results, minimum and maximum values of the results at any physically realistic parameter combination, and the contribution of the uncertainty of each parameter to the uncertainty of the model result. The uncertainty of a few rate parameters and a few enthalpies of formation causes most of the uncertainty of the model results. Most uncertainty comes from the inappropriate knowledge of kinetic data, but the uncertainty caused by thermodynamic data is also significant. FAU - Zador, Judit AU - Zador J AD - Department of Physical Chemistry, Eotvos University (ELTE), P.O. Box 32, H-1518 Budapest, Hungary. FAU - Zsely, Istvan Gy AU - Zsely IG FAU - Turanyi, Tamas AU - Turanyi T FAU - Ratto, Marco AU - Ratto M FAU - Tarantola, Stefano AU - Tarantola S FAU - Saltelli, Andrea AU - Saltelli A LA - eng PT - Journal Article PL - United States TA - J Phys Chem A JT - The journal of physical chemistry. A JID - 9890903 EDAT- 2006/07/13 09:00 MHDA- 2006/07/13 09:01 CRDT- 2006/07/13 09:00 PHST- 2006/07/13 09:00 [pubmed] PHST- 2006/07/13 09:01 [medline] PHST- 2006/07/13 09:00 [entrez] AID - 10.1021/jp053270i [doi] PST - ppublish SO - J Phys Chem A. 2005 Nov 3;109(43):9795-807. doi: 10.1021/jp053270i.