Numerical modeling of an underwater explosion in an air cavity

An efficient numerical algorithm based on Godunov method is proposed that permits qualitative and quantitative calculations of the hydrodynamic flows resulting from the detonation of explosive charges in an air cavity. Calculations are performed by a difference scheme using moving difference grids in which the moving boundaries are the contact surfaces between the detonation products and air and between air and water, and the shock-wave front. The reliability of the calculations is confirmed by experimental data.