Multiphase Particle Simulation of Gas Bubble Passing Through Liquid/Liquid Interfaces

Abstract

A newly developed computational fluid dynamics (CFD) model based on a multi-phase particle method is presented for predicting the entrainment behavior of liquid metal into slag due to rising single bubble. By comparing results calculated using this model against experimental data, it was found that the transient behavior of bubbles and the two immiscible liquids can be accurately estimated by this method. The rupturing of the thin water film surrounding the bubble was less reliably predicted, but this 3-dimensional unsteady numerical model still nevertheless provides valuable new information for directly predicting the change in the liquid/liquid interface over time. Such prediction of continuous change in an interface has not been possible by more conventional methods, and thus further improvement in the accuracy of this simulated model may well be the only way to non-empirically predict the metal-slag interface area in actual processes.

Observation of Interface Deformation in Sodium Polytungstate Solution–Silicone Oil System due to Single Rising Bubble

“…This procedure is similar to that used in our previous study. 23) Using this procedure, we observed that the rising bubble began to modify the SPTS-SO interface by pulling the SPTS phase upward through their interface.…”

Column and film lifetimes in bubble-induced two-liquid flow

“…Figure 2 shows the experimental setup used. The experiments were performed in an air-conditioned room at a fixed temperature of 293 K. First, an acrylic tank (inner dimensions: 0.040 × 0.090 × 0.295 m; with this tank design, the wall effect does not affect bubbles and the thin film is easy to observe [21,22]) was filled with the two liquid phases (height of each phase: 0.090 m). The aqueous SPT solution was the lower liquid phase (liquid 1), while SO (KF-96-10cs, Table I shows the physical properties of each solution [23][24][25].…”

Capturing the non‐spherical shape of granular media and its trickle flow characteristics using fully‐Lagrangian method

“…To calculate the surface tension, we used the inter-particle potential model. [29][30][31][32][33] We modeled the droplets as cubes with side lengths L50:050 m. For the liquid phase, we used water, and to verify the theoretical solution for the vibration period, we assumed conditions of non-viscosity, and a uniform melt. Figure 4 shows the calculated results for droplet vibration in each condition.…”

“…We analyzed droplet motion for respective cases in which the particle number was changed. To calculate the surface tension, we used the inter‐particle potential model . We modeled the droplets as cubes with side lengths .…”