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- W2898068089 abstract "We present a method to generate analytical coarse-grain cross sections for internal energy excitation and dissociation of nitrogen and apply it to the NASA Ames N2-N ab initio database. State-resolved cross sections from this database are reduced using the Uniform RoVibrational-Collisional bin model. With a 10-bin system as example we compare two sets of coarse-grain cross sections: one obtained by analytical inversion and another by direct binning. With analytical inversion we manage to compress the entire set of state-resolved data into a small set of parameters, sufficient to reconstruct the main features of the full database. This has the potential of massively reducing the computational cost in large-scale direct simulation Monte Carlo (DSMC) calculations, both concerning memory requirements and execution time. Combining this coarse-grain model with the N2-N ab initio database will enable much higher-fidelity DSMC simulation of nonequilibrium dissociation in shock-heated flows than is currently possible with conventional models." @default.
- W2898068089 created "2018-10-26" @default.
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- W2898068089 date "2020-05-01" @default.
- W2898068089 modified "2023-09-24" @default.
- W2898068089 title "Coarse-grain cross sections for rovibrational excitation and dissociation of the N2-N system" @default.
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- W2898068089 doi "https://doi.org/10.1016/j.chemphys.2020.110701" @default.
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