Dynamics of two-phase downwards flows in submerged entry nozzles and its influence on the two-phase flow in the mold

被引：57

作者：

Ramos-Banderas, A ^{[1
]}

Morales, RD ^{[1
]}

Sánchez-Pérez, R ^{[1
]}

García-Demedices, L ^{[1
]}

Solorio-Diaz, G ^{[1
]}

机构：

[1] IPN, ESIQIE, Dept Met & Mat Engn, Mexico City 07338, DF, Mexico

来源：

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 2005年 / 31卷 / 05期

关键词：

two-phase flows; SEN; mold; continuous casting; bubbles; PIV;

D O I：

10.1016/j.ijmultiphaseflow.2005.01.010

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Gas-liquid flows inside the submerged entry nozzle (SEN) of a slab mold and its influence in the flow field in the mold were studied using video recording, mathematical simulations and particle image velocimetry (PIV) approaches. Bubbly and annular flows in the SEN yield structurally-uncoupled and structurally coupled flows in mold, respectively. High gas loads (ratio of mass flux of gas and mass flux of liquid) at high casting rates lead to increases of bubble population and bubbles sizes due to coalescence processes whose rate exceeds that of their breakup. The presence of gas bubbles or gas layers inside the SEN lead to periodical twisting of the liquid flow that induces biased flows through both ports yielding uneven flows in the mold. A multiphase mathematical model predicts acceptably well the flow dynamics of two-phase flows inside the SEN. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：643 / 665

页数：23

共 22 条

[1]

[Anonymous], 2004, COMPUTATIONAL FLUID

[2]

[Anonymous], 80 STEELM C P ISS WA

[3] Turbulent flow of liquid steel and argon bubbles in slide-gate tundish nozzles: Part II. Effect of operation conditions and nozzle design [J].

Bai, H ;

Thomas, BG .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2001, 32 (02) :269-284

[4] Turbulent flow of liquid steel and argon bubbles in slide-gate tundish nozzles: Part I. Model development and validation [J].

Bai, H ;

Thomas, BG .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2001, 32 (02) :253-267

[5] Bubble formation during horizontal gas injection into downward-flowing liquid [J].

Bai, H ;

Thomas, BG .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2001, 32 (06) :1143-1159

[6] Effects of clogging, argon injection, and continuous casting conditions on flow and air aspiration in submerged entry nozzles [J].

Bai, H ;

Thomas, BG .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2001, 32 (04) :707-722

[7]

Burty M., 1995, 13 PTD C NASHV TN, V13, P287

[8]

CHUNG T, 2002, COMPUTER FLUID DYNAM

[9] VOLUME OF FLUID (VOF) METHOD FOR THE DYNAMICS OF FREE BOUNDARIES [J].

HIRT, CW ;

NICHOLS, BD .

JOURNAL OF COMPUTATIONAL PHYSICS, 1981, 39 (01) :201-225

[10] Model experiment on the behavior of argon gas in immersion nozzle [J].

Ishiguro, K ;

Iguchi, M .

ISIJ INTERNATIONAL, 2003, 43 (05) :663-670

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