WATER WAVES FROM SURFACE AND SHALLOW UNDERWATER BURSTS.
IIT RESEARCH INST CHICAGO ILL
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This report describes the theoretical development of a hydrodynamic computer code for the computation of the initial state of the water following a surface of shallow underwater explosion, and the subsequent response of the water for a limited time period later. The state of the water comprises the velocity, pressure, and energy distributions. The results of the computation provide a measure of the efficiency of the explosion in terms of the fraction of the mechanical explosive energy imparted to the water, and permit a prediction of the resulting surface wave shapes. The computation involves solving by an iterative numerical scheme, a set of Poisson-type partial differential equations with appropriate boundary conditions. Convergence criteria were established by numerical experimentation on the computer and by comparison with highspeed motion picture data obtained in smallscale underwater explosion tests. Author