Low- and zero-Mach-number models for Rayleigh-Taylor flows

作者：Gauthier Serge^*; Schneider Nicolas

来源：Computers & Fluids, 2017, 151: 85-90.

DOI：10.1016/j.compfluid.2017.02.015

• Rayleigh-Taylor instability
• Low-Mach-number models
• Asymptotic analysis

We derive low-Mach-number models for the Rayleigh-Taylor instability within asymptotic analysis. In particular, the Sandoval model is derived from the quasi-isobaric model in situations where the Prandtl number is vanishing and the speed of sound and the ratio of specific heats are infinite. Four incompressible-like models are thus available (two low-Mach-number and two zero-Mach-number), the anelastic model for stratification of the order of 1, three models for a vanishing stratification, the quasi isobaric model, the Sandoval model and the Boussinesq approximation for a vanishing Atwood number.

• 出版日期2017-6-27
• 单位中国地震局