WIT Press

Numerical Study Of Water Plume Behavior Under Shallow Depth Explosion


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WIT Press


C.-C. Liang, T.-H. Liu & W.-M. Tseng


The most obvious and spectacular features of underwater explosions are the disturbances of the water surface above the charge. The overall hydrodynamic phenomena involved in this process are extremely complicated. Much of the present knowledge and understanding of this field was acquired because of the demands and the few available discussions of the subject have become inadequate or obsolete. This paper evaluates and proceeds on simulation ability of shallow depth explosion plume by MSC.Dytran finite element software. Also in this paper, numerical studies of explosion plume which includes contours of the plume (plume height, plume width and plume thickness) are investigated in details and compared with the relative literature’s empirical methodology. The studies presented in this paper attempt to supply a reasonable comprehensive account, which will be used for workers in the field of underwater explosion and others who are interested in the water Barrier Defense. Keywords: underwater explosion, shock bubble, water plume, water barrier. 1 Introduction The phenomena of water plume (Figure 1) during an underwater explosion of solid explosives are still not very well understood. The most obvious features above the surface depend considerably on the initial depth of the charge, being quite spectacular for shallow explosions. The sequence of events in the shallow case may be quite complicated, but three main phases can be distinguished. These results form the arrival of the primary shock wave at the surface, and the final breakthrough of the gases to the atmosphere [1-3]. The first effect of the explosion to arrive at the surface is the underwater shock wave. The shock wave


underwater explosion, shock bubble, water plume, water barrier.