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- Title
Behavior of the Free Surface of Two-Phase Fluid Flow Near the Taphole in a Tank.
- Authors
Yoon, Hyun-Sik; Park, Kyung-Min; Brevik, Iver H.
- Abstract
The present study numerically investigated the deformation of the free-surface of two-phase fluid flow in a tank which is considered as a simplified blast furnace hearth. Actually, the fluids existing in a blast furnace hearth are gas, slag and hot metal from top to bottom. However, the present study considered only gas and cold molten iron in the tank. The porosity is considered as a substitute for void volume formed by the packed bed of the particles such as cokes. The single-phase flow and two-phase fluids flow without the porosity are analyzed for comparison. The porosity contributed the free surface to forming a viscous finger near the taphole. The axi-symmetry nature of the interface of two-phase fluids flow in the cylindrical tank is broken by viscous finger as the interface instability by the gas entrainment into taphole, which has been identified by the visualization of the free surface formation. The acceleration of the free surface falling velocity and the outflow near the taphole are associated by the viscous finger by the gas entrainment. The dimensionless gas break-through time is linear with respect to the porosity magnitude.
- Subjects
FLUID flow; TWO-phase flow; SINGLE-phase flow; LIQUID iron; COLD gases; FLOW visualization; FREE surfaces
- Publication
Symmetry (20738994), 2021, Vol 13, Issue 5, p875
- ISSN
2073-8994
- Publication type
Article
- DOI
10.3390/sym13050875