湍流模型对结晶器内流场数值模拟结果的影响

以Fluent 6.3为计算平台,采用数值模拟的方法研究了5种常用湍流模型对电磁制动下连铸板坯结晶器内钢液流动计算结果的影响,并与水模型和实测结果进行了对比.结果表明:标准κ-ε和低雷诺数κ-ε模型的计算结果与实际流场较为接近,而重整化群κ-ε和剪切应力输运κ-ω模型与实际流场相差较远.不同湍流模型计算得到的弯月面形状...

Effect of Turbulence Models on Numerically Simulated Fluid Flow in Casting Molds

The influence of five turbulence models on numerically simulated fluid flow in a slab continuous casting mold was investigated using EMBR(electromagnetic brake) and Fluent 6.3 software.Results were compared with data obtained from a hydraulics model experiment or from actual factory measurements.Data obtained by a standard k-ε model or by a low-Re k-ε model conformed to real conditions,whereas data generated by an RNG(renormalization group) k-ε model or by an SST(shear-stress transport) k-ε model lacked sufficient accuracy.Meniscus shapes obtained by the turbulence models were similar,but the standard k-ε model generated values even closer to actual conditions.Required computer memory and time expense of numerical simulation by the Spalart-Allmaras model are less than that of other models and the computing efficiency of the SST k-ε model is the lowest.