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The LIMMCAST Program at HZDR:Modelling of Fluid flow and Transport Phenomena in the Continuous Casting Process

Journal of Iron and Steel Research International 2012年第S1期19卷 1-8页

作者： Gerbeth Gunter Eckert Sven Stefani Frank Timmel Klaus Wondrak Thomas Helmholtz-Zentrum Dresden-Rossendorf P.O.Box 51011901314 DresdenGermany

Model experiments with low melting point liquid metals are an important tool to investigate the flow structure and related transport processes in melt flows relevant for metallurgical *** present the new experimental facility LIMMCAST for modelling the continuous casting process of steel using the alloy SnBi at temperatures of 200-400℃.The parameters of the facility and the dimensions of the test sections will be given,and the possibilities for flow investigations in tundish,submerged entry nozzle and mould will be *** addition,the smaller set-up Mini-LIMMCAST will be presented,which works with the room-temperature liquid alloy *** main value of cold metal laboratory experiments consists in the capabilities to obtain quantitative flow measurements with a reasonable spatial and temporal *** ultrasonic and electromagnetic techniques for measuring the velocity in liquid metal flows came up during the last decade allowing for a satisfying characterisation of flow quantities in the considered temperature range up to 400℃.First results from LIMMCAST and Mini-LIMMCAST will be presented covering the following phenomena:fully contacfless electromagnetic tomography of the flow in the mould,flow monitoring by a multitude of ultrasonic sensors,and analysis of the flow in the mould under the influence of an electromagnetic brake: intensification of the flow turbulence contrary to the expected flow damping,injection of argon bubbles through the stopper rod:occurrence of pressure oscillations.

关键词： continuous casting liquid metal model mould flow flow measurements two-phase flow magnetic flow tomography ultrasound Doppler method

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Modeling of unsteadiness of fluid flows and level fluctuations in thin slab continuous casting moulds

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Baosteel Technical Research 2010年第3期4卷 49-52页

作者： ZHANG Huanxin WANG Lei LIU Baicheng Shanghai Baosteel Engineering ＆ Technology Co. Ltd. Baosteel Group Corporation Shanghai 201900 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China

Unsteady fluid flows and level fluctuations in a thin slab continuous casting mould have significant influence on product quality. In this study, the phenomena concerning transient flow features and free surface motions were analyzed by means of the large eddy simulation （LES） software with the smagorinsky SGS model--VisualCast （VCast） II, where the Simpler algorithm on a body-fitted mesh was used to resolve governing equations. A series of water analog experiments on the fluid flow and the surface wave in the moulds of thin slab continuous casting were also performed. The results of fluid regions, middle of vortex and level fluctuation from digital simulations were identical with the results of the water analog experiments.

关键词： thin slab continuous casting mould flow level fluctuation mathematical simulation water analog experiment

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