期刊
JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
卷 20, 期 1, 页码 41-51出版社
AMER INST AERONAUT ASTRONAUT
DOI: 10.2514/1.15868
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The direct-simulation Monte Carlo (DSMC) method has recently been developed to simulate homogeneous condensation in a free-expansion rocket plume. However, cluster-monomer and cluster-cluster collision models as well as the determination of cluster size were simplified in the previous work, and the effect on the accuracy of the numerical simulation results was not quantified. In this work, the molecular-dynamics (MD) method is used to simulate collision and sticking probabilities for argon clusters and the results are compared with the hard-sphere model. These improved models are then integrated into a DSMC code to predict the Rayleigh scattering intensity in a free-expanding argon condensation plume, and numerical results are compared with experimental data along the plume centerline.
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