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A unified second-order moment (USM) turbulence-chemistry model for simulating NO x formation in turbulent combustion is proposed. All the correlations, including the correlation of the reaction-rate coefficient fluctuation with the concentration fluctuation, are closed by the transport equations in the same form. This model abandons the series expansion approximation of the exponential term...
For simulating NO x formation in combustion presently used turbulence-chemistry models either cannot or are inconvenient to simulate finite reaction rate, or need extremely large computation time and storage, difficult to be used in engineering complex flows. Hence, different second-order moment (SOM) turbulence-chemistry models are proposed. The SOM models can well simulate CH 4 -O...
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