Investigation on the cavitation and atomization characteristics of multiphase fluids in underwater explosion near a free surface

The characteristics of cavitation and atomization induced by underwater explosion near a free surface have been investigated the multiphase fluid model based on two-fluid phase transition. This numerical method can provide transition between liquid its vapor phases during shock wave rarefaction propagation at any time in explosion. detailed density, pressure, vapor, volume fraction contours zones be obtained. was first used to quantitatively research phenomenon liquefaction after initial water containing different trace amounts vapor. Then contribution formation through tube test two typical cases. It is found that effect contributes more than 60% zone. Two charges under conditions comparison with case single charge. We conclude it very necessary introduce into simulation explosion, which details flow field cannot obtained one-fluid model.