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- W2154995565 abstract "The efficiency and accuracy of several algorithms recently developed for the efficient numerical integration of stiff ordinary differential equations are compared. The methods examined include two general-purpose codes, EPISODE and LSODE, and three codes (CHEMEQ, CREK1D, and GCKP84) developed specifically to integrate chemical kinetic rate equations. The codes are applied to two test problems drawn from combustion kinetics. The comparisons show that LSODE is the fastest code currently available for the integration of combustion kinetic rate equations. An important finding is that an interactive solution of the algebraic energy conservation equation to compute the temperature does not result in significant errors. In addition, this method is more efficient than evaluating the temperature by integrating its time derivative. Significant reductions in computational work are realized by updating the rate constants (k = at(supra N) N exp(-E/RT) only when the temperature change exceeds an amount delta T that is problem dependent. An approximate expression for the automatic evaluation of delta T is derived and is shown to result in increased efficiency." @default.
- W2154995565 created "2016-06-24" @default.
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- W2154995565 date "1984-10-01" @default.
- W2154995565 modified "2023-09-26" @default.
- W2154995565 title "Comparison of numerical techniques for integration of stiff ordinary differential equations arising in combustion chemistry" @default.
- W2154995565 hasPublicationYear "1984" @default.
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