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Numerical Simulation of Coexisting Solid-liquid Slag Trickle Flow in a Coke Bed by the SPH Method with a Non-Newtonian Fluid Model
| Title: | Numerical Simulation of Coexisting Solid-liquid Slag Trickle Flow in a Coke Bed by the SPH Method with a Non-Newtonian Fluid Model |
| Authors: | Natsui, Shungo Browse this author →KAKEN DB | | Sawada, Akinori Browse this author | | Nogami, Hiroshi Browse this author | | Kikuchi, Tatsuya Browse this author →KAKEN DB | | Suzuki, Ryosuke O. Browse this author →KAKEN DB |
| Keywords: | ironmaking blast furnace | | coke bed | | trickle flow | | molten slag | | static holdup | | Bingham plastic fluid |
| Issue Date: | 15-Jul-2020 |
| Publisher: | 一般社団法人 日本鉄鋼協会 (The Iron and Steel Institute of Japan) |
| Journal Title: | ISIJ international |
| Volume: | 60 |
| Issue: | 7 |
| Start Page: | 1445 |
| End Page: | 1452 |
| Publisher DOI: | 10.2355/isijintemational.ISIJINT-2019-701 |
| Abstract: | A simulation of the dripping behavior of solid-phase suspended molten slag in a coke bed was performed using the Bingham fluid model in the framework of smoothed particle hydrodynamics (SPH). SPH can track the motion of droplets which are suspended in dispersed solids. A case study was performed in which the yield coefficient varied with the viscosity coefficient of the molten SiO2-CaO-Al2O3 slag, with suspended solids approximated by the Bingham fluid model, and the holdup droplets were trapped at approximately the same site regardless of the yield value. When the yield value exceeded the threshold, the volume of each holdup droplet increased. This threshold is correlated with the decrease in the shear rate at the bottleneck. Increasing the solid phase ratio in the molten slag is also predicted to increase the yield value with viscosity; thus, the amount of holdup droplets increases at the specific holdup sites as a dispersed phase. This indicates that the increase in the yield value approaches the powder holdup mechanism that is closed one after another starting from a specific holdup site. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/79865 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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