A MODEL OF MEDIUM DISPERSION AT A LIQUID-GAS INTERFACE
M. S. Samigulin, P. A. Kucherova, A. L. Yolkina, I. Yu. Tagirova, Yu. F. Danilov, N. V. Nevmerzhitsky
VANT. Ser.: Mat. Mod. Fiz. Proc 2017. Вып.1. С. 17-29.
An approach to the numerical simulation of the medium dispersion process at a liquid-gas interface owing to Kelvin-Helmholtz and Rayleigh-Taylor instabilities is described. A sub-grid model of dispersion based on the analytical dependence of the perturbation amplitude on the conditions at the interface forms the basis for this approach. The model has been implemented in the LEGAK code for the numerical simulation of the dispersed medium dynamics, in which the carrying component dynamics is described in continuum (Eulerian) approximation and the disperse component dynamics - in discrete approximation. The code capabilities to simulate the generation and dynamics of gas-droplet mixtures are demonstrated by the example of describing results of experiments with the explosion-induced surface dispersion of a water layer and liquid acceleration by the compressed gas. Keywords: numerical simulation, LEGAK code, dispersion, Kelvin-Helmholtz instability, Rayleigh-Taylor instability, dynamics of disperse media.
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