SPH simulations of the behavior of the interface between two immiscible liquid stirred by the movement of a gas bubble

Natsui, Shungo; Nashimoto, Ryota; Takai, Hifumi; Kumagai, Toru; Kikuchi, Tatsuya

doi:10.1016/j.ces.2015.11.018

Cited by 26 publications

(11 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…22) However, this domain corresponds with calculation condition in previous report. 9) Interface changes were recorded using a high-speed video camera (FASTCAM, Photoron Co., Ltd.) at a rate of 2 000-10 000 frames per second and a resolution of 1 024 × 1 024 pixels. For each image capture, the position of the interface of each phase was analyzed using image processing software.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2017

Self Cite

View full text Add to dashboard Cite

The interfacial behavior between sodium polytungstate solution (SPTS) and silicone oil (SO) due to a single rising bubble was directly observed to investigate the influence of the Eötvös number on the flow characteristics. We found that the transient behavior of the jet under the bubble strongly depended on the SPTS density in the range of 1 000-3 000 kg/m 3. Although the SPTS film generated in the SO influenced the detention time of the jet under the bubble, the lifetime of the film did not depend on the SPTS density.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Highly sophisticated computational fluid dynamics models have been developed and applied to study the interfacial flow of high-temperature melts. [6][7][8][9][10][11][12] Nevertheless, even when high-performance computers are used, the analysis scale is not sufficient to clarify the interfacial phenomena completely.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the other hand, recent numerical analyses by the Lagrangian approach, which can track moving calculation points, has been adopted for multi-fluid physics problems in a high-temperature metallurgical process with a complicated interface. 11,[27][28][29][30][31][32][33] The advantage of this method is the explicit tracking of time-varying fluid interfaces, which is difficult to observe experimentally. The smoothed particle hydrodynamics (SPH) method, which discretizes a continuous fluid phase by moving particles, is suitable for the analysis of interfacial flow, even for the large number of dispersed liquid phase.…”

Section: Detailed Modeling Of Melt Dripping In Coke Bed By Dem -Sphmentioning

confidence: 99%

“…Since the density varies under SPH assumption, it is essential that ρ be defined as a density function 〈ρ〉 i for each particle ρ i →〈ρ〉 i , as detailed in a previous study. 29,30) 2.1.…”

Section: (4)mentioning

confidence: 99%

Detailed Modeling of Melt Dripping in Coke Bed by DEM – SPH

et al. 2018

Self Cite

View full text Add to dashboard Cite

A high-resolution numerical model was performed for a detailed understanding of packed-bed structures constructed by actual scale cokes, and the molten slag (SiO 2-CaO-Al 2 O 3) trickle flow characteristics in the lower part of an actual blast furnace. Smoothed particle hydrodynamics (SPH) simulations can track the motion of liquids containing dispersed droplets, and the discrete element method (DEM) with a multisphere approach makes possible to simulate non-spherical solid-particle motion. We carried out highresolution large-scale trickle flow simulations using more than 10 million particles, carried out case studies of statistical processing, and evaluated the effects of physical properties varied by the composition or temperature of slag samples. We clarified that there is a limitation to predict the holdup accurately based on the capillary number, which is a widely used approach. We analyzed the influence of melt viscosity on trickle flow, and clarified that an increase in viscosity increases holdup because limiting the effective flow path and suppressing the dispersion of the droplets promoted the enlargement of each stagnant droplet. This detailed direct dynamic model could explain the mechanism underlying different holdup tendencies in conventional research.

show abstract

“…The smoothed particle hydrodynamics (SPH) method discretizes a continuous fluid phase by moving particles and is suitable for analyzing interfacial flow, even for numerous dispersed phases. This method can track the dripping flow [25], the movement of both the gas and the liquid phase [26], fluid flow in bed structures having different shapes (coupled with multi-sphere DEM) [27,28], and solid particle penetration into the liquid iron bath [29,30] directly. Recently, with the increase in computer capacity, the SPH method has been applied to very complicated interface problems [31].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Binary Trickle Flow of Liquid Iron and Molten Slag in Coke Bed by Smoothed Particle Hydrodynamics

et al. 2020

Self Cite

View full text Add to dashboard Cite

In the bottom region of blast furnaces during the ironmaking process, the liquid iron and molten slag drip into the coke bed by the action of gravity. In this study, a practical multi-interfacial smoothed particle hydrodynamics (SPH) simulation is carried out to track the complex liquid transient dripping behavior involving two immiscible phases in the coke bed. Numerical simulations were performed for different conditions corresponding to different values of wettability force between molten slag and cokes. The predicted dripping velocity changes and interfacial shape were investigated. The relaxation of the surface force of liquid iron plays a significant role in the dripping rate; i.e., the molten slag on the cokes acts as a lubricant against liquid iron flow. If the attractive force between the coke and slag is smaller than the gravitational force, the slag then drops together with the liquid iron. When the attractive force between the coke and slag becomes dominant, the iron-slag interface will be preferentially detached. These results indicate that transient interface morphology is formed by the balance between the momentum of the melt and the force acting on each interface.

show abstract

SPH simulations of the behavior of the interface between two immiscible liquid stirred by the movement of a gas bubble

Cited by 26 publications

References 47 publications

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

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

Detailed Modeling of Melt Dripping in Coke Bed by DEM – SPH

Numerical Study of Binary Trickle Flow of Liquid Iron and Molten Slag in Coke Bed by Smoothed Particle Hydrodynamics

Contact Info

Product

Resources

About