Abstract

Shock propagation in a stratified liquid layer of silicone-oil and water was investigated experimentally and numerically. Experiments were conducted for fast/slow and slow/fast combinations of liquids having different acoustic impedances and different sound speeds. In the fast/slow case, the shock wave propagates from the liquid with faster sound speed to that with slower sound speed. In the slow/fast case, the direction of shock propagation is opposite to the fast/slow case. Water represents a fast medium and silicone-oil represents a slow one. A spherical shock wave was generated by detonating a 10 mg silver azide pellet. The interaction of the shock wave and the silicone-oil/water interface was observed by double exposure holographic interferometry. Numerical simulations were carried out using a TVD finite difference scheme.

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