The Splashing of Melt upon the Impact of Water Droplets and Jets

Abstract

Small-scale experimental studies of melt splashing upon the impact of water are presented here, with a focus on the fluid dynamics and thermal aspects of these interactions. Gravity-accelerated droplets and forced short-duration water jets interacted with liquid Rose’s alloy superheated to 100–200 degrees above its melting point. A repeatability study was performed for better-control of the gravity fall of a droplet. The amount of perturbation on the melt surface was obtained from a video recording, and indicated the existence of three principal stages of interaction. The cases using the forced water jet demonstrated the occurrence of a cumulative jet of melt following the collapse of the cavity caused by the water impact. Also, it was shown that numerous small-diameter melt droplets were scattered by the primary impulse, and small-scale micro-eruptions were observed, which generated small but fast melt droplets at the later stages of interaction.

Experimental Study on the Interaction of an Impulse Water Jet with Molten Metal

“…), where this ratio is about 1:1. This research significantly extends the recent scoping study on water-metal interactions [17,18] by improving the water-jet parameter repeatability and studying the effects of the melt vessel shape, the molten pool depth, and the water temperature. Its novelty is also attributed to the detailed study of the fluid dynamics of the cavity formation and collapse in the melt layer.…”

“…First attempts to study melt splashing caused by an impact of impulse water jets and falling droplets were undertaken in our previous works [17,18], where a small number of scoping experiments were performed. The results obtained highlighted many interesting features of the interaction, including the formation of melt splashes and central jets similar to those in water-water interactions, the fine fragmentation of water and melt, and the scattering of very fine melt droplets (observed as solid particles after freezing).…”

Экспериментальное Исследование Взаимодействия Импульсной Струи Воды С Расплавленным Металлом

“…), где это соотношение составляет около 1:1. Это исследование значительно расширяет недавнее исследование взаимодействия воды и металла [6,7] за счет улучшения повторяемости параметров струи воды, и изучения влияния формы емкости для расплава, глубины слоя расплава и температуры воды. Его новизна также состоит в детальном изучении гидродинамики образования полости (каверны) в слое расплава и ее схло-…”

Modelling of water jet impact on molten metal

“…To save the computational efforts, we took advantage of the symmetry of the problem, so the domain covered 1/4 of the actual space; see the sketch in figure 1. The melt pool was of depth The properties of materials and parameter ranges were selected in line with the experiments [7] where water jet interaction with Rose's metal was studied. The melt density was…”

“…The problem of melt splash due to impingement of a water jet is also of fundamental value because it adds another (thermal) dimension to the well-known problem of water droplet impingement on water surface; also, melt-water interactions are featured by much higher (about 10:1 vs 1:1) density ratio. Such interactions were studied experimentally in [7], and numerically in [8] (in the axisymmetric statement of the problem). In the current work, three-dimensional simulations of melt-water interactions are performed, extending the previous work by the authors [8].…”