Abstract
The two-phase model of aqueous foam behavior under strong spherical shock wave (SW) impact, is developed using equations of mixture conservation of momentum, mass and internal energy for each phase in Lagrange variables, taking into account bulk viscosity and interphase heat transfer. The numerical implementation of the model was carried out by the counting method, using the Neu-mann-Richtmyer viscosity and the Courant stability condition. The spherical explosion was modeled in the form of a SW, which has the same energy of charge of explosives, as used in experiments. A satisfactory agreement was obtained between the numerical solution, received by the proposed model, the analytical self-similar L.I. Sedov’s solution on a point spherical explosion in a gas and a new experimental data on the spherical explosion in aqueous foam. The causes, which lead to a significant decrease in amplitude and SW velocity in the studied media, are investigated in detail.
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Funding
This work was partially supported by the Russian Foundation for Basic Research under Grant 17-41-020582, the Grant of the Bashkortostan Republic of Russian Federation to young scientists (no. 8 GR 18.03.2019), the state budget funds for the state assignment 0246-2019-0052 of RAS and the Program of Russian Academy of Sciences (OE IV-12-4 DEMbMCP).
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Russian Text © The Author(s), 2019, published in Prikladnaya Matematika i Mekhanika, 2019, Vol. 83, No. 3, pp. 468–477
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Bolotnova, R.K., Gainullina, E.F. Influence of Heat Transfer on Decreasing Intensity of a Spherical Explosion in Aqueous Foam. Fluid Dyn 54, 970–977 (2019). https://doi.org/10.1134/S0015462819070024
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DOI: https://doi.org/10.1134/S0015462819070024