Three-dimensional dynamic computation of shaped charge jet

To study the mechanism of shaped charge jet formation, MMIC3D-YIT code is made based on the algorithm of Youngs interface technique. The mathematical model and numerical method used in the program were introduced. By the 3D numerical simulation of a shaped charge jet, the formation and propagation of the detonation wave, the formation and stretching of the jet are obtained. During the stretching process of the jet, the velocity of the jet decreases gradually from the head position to the tail position of the jet, and moreover, the velocity gradient of the jet head position is less than other part, the velocity of which varies linearly. These agree with the experimental phenomena and the principle of physics. This also indicates that the algorithm and the code presented above are correct, which can provide a direct theoretical basis for improving engineering designs.