An Analytical Model on Vapor Explosion of a High Temperature Molten Metal Drop in Water Induced by a Pressure Pulse

Simultaneous high speed digital cinematographic and X-ray radiographic imaging of a intense multi-fluid interaction with rapid phase changes

“…In this respect, it is worth noting that in an early work of Kim and Corradini [20] on droplet explosion, the coolant entrapment mechanism impelled by the growth of RayleighTaylor instabilities during vapor film disturbance was proposed. This mechanism was later disputed as unlikely, when Inoue et al [3] showed that the difference of densities was too high making it very difficult for the coolant to entrain in the molten material.…”

“…A number of phenomenological models have been proposed to depict the fine fragmentation of the high temperature liquid [1], which are commonly categorized into two groups: thermal [2,3] and hydrodynamic [4,5]. The thermal fragmentation models are based on the formation of micro coolant jets that penetrate the surface of the hot melt or the generation of local high-pressure regions which stretch and break up the melt.…”

3D simulations of the hydrodynamic deformation of melt droplets in a water pool

“…Literature reveals the experimental works include various scales ranging from the larger melt mass (Yamano et al, 1995;Huhtiniemi et al, 1999;Huhtiniemi and Magallon, 2001;Song et al, 2003) to single droplet study (Patel and Theofanous, 1981;Ciccarelli and Frost, 1994;Hansson et al, 2009a,b). Many fuel-coolant-interaction models were developed to improve the understanding of steam explosion and predict the results of experiments (Buchanan, 1974;Fletcher and Thyagaraja, 1989;Inoue et al, 1992). The fragmentation of the melt plays a crucial role in the process of steam explosion which determines the surface area of melt exposed and hence governs the heat transfer rate.…”

Analysis of bubble dynamics in explosive boiling of droplet with fine fragmentation

“…However, the agreement between numerical calculations with experimental results is not found to be very satisfactory. A simplified model, based on the vapour bubble dynamics and Taylor instability, is proposed by Inoue et al [1] which finds good agreement between the experimental results with the numerical one, but the amount of fragmented mass in each vapour bubble collapse is assumed to follow the experimental data.…”

“…A analytical model similar to the one proposed by Inoue et al [1] has been remodelled by including a stability model for the purpose of analysing fragmentation process; this has been compared with Nelson et al [2] single drop experiment. Stability analysis considered here is similar to one described by Kim and Coradini [7], but many more features which have been neglected by Kim and Coradini [7] have been included.…”