Numerical simulation of unsteady reacting flow with detailed kinetics

机译：具有详细动力学的非稳态反应流的数值模拟

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We discuss the construction and implementation of two numerical schemes for the simulation of unsteady reacting flow with detailed kinetics. Both schemes use a semi-implicit time stepping procedure which incorporates an implicit ODE integrator for the stiff reaction source terms. The first scheme relies on an additive, non-split approach that combines implicit integration of the reaction source terms with a second-order predictor-corrector treatment of advection and diffusion. The second scheme relies on a Strang-type operator-split formulation, in which the implicit integration of reaction source terms is combined with an explicit fractional step update of the diffusion source terms. The performance of the schemes is discussed in light of 1D convergence tests as well as large-scale unsteady 2D computations using a detailed C_1C_2 methane-air mechanism.

机译：我们讨论了用于建立具有详细动力学的非稳态反应流的两种数值方案的构造和实现。两种方案都使用半隐式时间步长程序，该程序包含用于刚性反应源项的隐式ODE积分器。第一种方案依赖于加性非拆分方法，该方法将反应源项的隐式积分与对流和扩散的二阶预测器-校正器处理相结合。第二种方案依赖于Strang型算子拆分公式，其中反应源项的隐式积分与扩散源项的显式分数阶更新结合在一起。根据一维收敛测试以及使用详细的C_1C_2甲烷-空气机理的大规模非稳态2D计算，讨论了该方案的性能。

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《MIT Conference on Computational Fluid and Solid Mechanics Vol.2 Jun 12-15, 2001》|2001年|p.1261-1264|共4页
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O.M. Knio; H.N. Najm;
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Department of Mechanical Engineering, The Johns Hopkins University, 3400 Charles Street, Baltimore, MD 21218, USA;

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原文格式 PDF
正文语种 eng
中图分类力学;
关键词
implicit; stiff; operator splitting; chemistry; reacting; flow; projection;

机译：隐含的僵硬;操作员拆分；化学;反应流;投影;

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Numerical simulation of unsteady reacting flow with detailed kinetics

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