Collapse and dynamics of a bubble near a rigid boundary enveloped by a vapor film

One of the possible consequences a severe accident at nuclear power plant with pressurized water reactor is steam explosion that occurs as result interaction high-temperature melt core materials and can lead to failure containment. The paper considers initial stage (premixing water) under stratified geometry. key phenomenon leading premixing dynamic effect collapsing vapor bubble in liquid on surface. influence film located near surface dynamics considered. Kelvin impulse used main criterion characterizing liquid-vapor interface all parameters was numerically studied. Based calculations carried out plane “film thickness - density”, region impact determined. greatest impacts are observed for thin films having high density.