Fluid Flow and Mixing in Non-Isothermal Water Model of Continuous Casting Tundish  被引量:3

Fluid Flow and Mixing in Non-Isothermal Water Model of Continuous Casting Tundish

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作  者:Mehdi ALIZADEH Hossein EDRIS Ali SHAFYEI 

机构地区:[1]Department of Materials Engineering,Isfahan University of Technology

出  处:《Journal of Iron and Steel Research International》2008年第2期7-13,22,共8页

摘  要:Fluid flow and mixing of molten steel in a twin-slab-strand continuous casting tundish were investigated using a mixing model under non-isothermal conditions.This model led to a set of ordinary differential equations that were solved with a Runge-Kutta algorithm.Steady state water modeling was carried out under non-isothermal conditions.Experimental data obtained from the water model were used to calibrate the mixing model.Owing to the presence of a mixed convection in the non-isothermal conditions,a channelizing flow would be created in the fluid inside the tundish.A mixing model was designed that was capable of predicting RTD(residence time distribution)curves for different cases in non-isothermal conditions.The relationship between RTD parameters and the Tu(tundish Richardson number)was obtained for various cases under non-isothermal conditions.The results show that the RTD parameters were completely different under isothermal and non-isothermal conditions.The comparison of the RTD curves between the isothermal and non-isothermal conditions presents that the extent of mixing in the tundish in non-isothermal conditions is lower than the mixing extent in isothermal conditions.Fluid flow and mixing of molten steel in a twin-slab-strand continuous casting tundish were investigated using a mixing model under non-isothermal conditions.This model led to a set of ordinary differential equations that were solved with a Runge-Kutta algorithm.Steady state water modeling was carried out under non-isothermal conditions.Experimental data obtained from the water model were used to calibrate the mixing model.Owing to the presence of a mixed convection in the non-isothermal conditions,a channelizing flow would be created in the fluid inside the tundish.A mixing model was designed that was capable of predicting RTD(residence time distribution)curves for different cases in non-isothermal conditions.The relationship between RTD parameters and the Tu(tundish Richardson number)was obtained for various cases under non-isothermal conditions.The results show that the RTD parameters were completely different under isothermal and non-isothermal conditions.The comparison of the RTD curves between the isothermal and non-isothermal conditions presents that the extent of mixing in the tundish in non-isothermal conditions is lower than the mixing extent in isothermal conditions.

关 键 词:TUNDISH non-isothermal condition mixing model water modeling 

分 类 号:TG249.7[金属学及工艺—铸造]

 

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