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Hokkaido University Collection of Scholarly and Academic Papers >
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Detailed Modeling of Melt Dripping in Coke Bed by DEM – SPH
| Title: | Detailed Modeling of Melt Dripping in Coke Bed by DEM – SPH |
| Authors: | Natsui, Shungo Browse this author →KAKEN DB | | Ohno, Ko-ichiro Browse this author | | Sukenaga, Sohei 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 | | DEM-SPH | | basicity |
| Issue Date: | 15-Feb-2018 |
| Publisher: | 日本鉄鋼協会 |
| Journal Title: | ISIJ International |
| Volume: | 58 |
| Issue: | 2 |
| Start Page: | 282 |
| End Page: | 291 |
| Publisher DOI: | 10.2355/isijinternational.ISIJINT-2017-496 |
| Abstract: | A high-resolution numerical model was performed for a detailed understanding of packed-bed structures constructed by actual scale cokes, and the molten slag (SiO2–CaO–Al2O3) 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 high-resolution 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. |
| Rights: | 著作権は日本鉄鋼協会にある |
| Type: | article |
| URI: | http://hdl.handle.net/2115/76153 |
| 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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Submitter: 夏井 俊悟
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