Shock Scattering in Multiphase Flow Model

[摘要] Multiphase flow models have been proposed for use in situations which have combined Rayleigh-Taylor (RTI) and Richtmyer-Meshkov (RMI) instabilities. Such an approach works poorly for the case of a heavy to light shock incidence on a developed interface. The physical original of this difficulty is traced to an inadequate model of the interfacial pressure term as it appears in the momentum and turbulence kinetic energy equations. Constraints on the form of a better model from a variety of sources are considered. In this context it is observed that a new constraint on closures arises. This occurs because of the discontinuity within the shock responsible for the RMI. The proposed model (Shock Scattering) is shown to give useful results.

[发布日期] 2003-10-16 [发布机构] Lawrence Livermore National Laboratory

[关键词] Multiphase Flow;Closures;42 Engineering;Turbulence;71 Classical And Quantumm Mechanics, General Physics