Numerical Simulation of Explosive Dispersion of a Spherical Liquid Volume
Authors: Menshakov S.S., Taran V.A.
Published in issue: #10(178)/2026
Category: Mechanics | Chapter: Mechanics of Liquid, Gas, and Plasma
A method for numerical simulation of the formation of an air-dispersed system (ADS) from a spherical liquid volume in air during the explosion of an internal central charge of a condensed explosive (HE) has been developed. Such processes occur, for example, during the operation of aviation fire-extinguishing means (AFEM) or Fuel Air Explosive (FAE) bombs. The development of the method was based on a single-velocity isobaric model of a two-phase medium consisting of gas and liquid phases with the corresponding equations of state for ideal and “compressed” gases. Since negative pressures may appear in the liquid, and hence cavitation regions may arise, a simple cavitation model was adopted for calculating such regions, in which cavitation (liquid rupture) occurs when the pressure decreases to a certain minimum value psat, after which the pressure no longer decreases but remains constant. In this work, a calculation was carried out in which a spherical TNT charge with a radius of 0.05 m was located inside a water sphere with a radius of 0.25 m, the rest of the computational domain was occupied by air, and the detonation of the charge was assumed to be instantaneous. The calculation results showed a fairly good qualitative and quantitative description of the process of explosive formation of the ADS.
EDN REIXSE
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