Rayleigh-Brillouin scattering spectra of SF6 are modeled at room temperature in the pressure range [0.2-5] bar and compared to recent experimental measurements (Wang et al., 2017). It is shown that lineshape models that account for density-dependent corrections to the thermodynamic properties provide substantially better agreement than the models assuming an ideal gas model. For intermediate pressures, where a hydrodynamic description of the spectra fails due to kinetic effects, the Enskog-Vlasov kinetic model is shown to reproduce experimental data with good accuracy both at low and high pressure.
Dense gas effects in the Rayleigh-Brillouin scattering spectra of SF6
Bruno, D.; Frezzotti, A.
Journal:
Chemical physics letters (Print) 731 pp. 136595-1 - 136595-9
Year:
2019
ISTP Authors: Domenico Bruno
Keywords: Rayleigh-Brillouin scattering, SF6 gas, DSMC simulation, Enskog-Vlason kinetic equation
Research Activitie: JOURNAL ARTICLES
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