二阶矩两相湍流模型中的改进算法

Improved Method for Second-Order Moment Two-Phase Turbulence Model

建立了融合SIMPLEC算法在内的考虑了浓度修正影响的颗粒压力修正方程。提出了二阶矩湍流模型下考虑浓度修正值影响的两相湍流流动的算法,并将它和没有考虑浓度修正值影响的二阶矩湍流模型进行了对照。结果表明在二阶矩模型中是否考虑浓度修正影响会不同程度地影响流场的速度以及浓度等参数分布,考虑浓度修正影响的二阶矩湍流模型更能有效地预测稠密两相湍流流动。

The pressure correction equation of particle is established where the correction of particle volumetric fraction in SIMPLEC algorithm is combined.An improved algorithm for second-order moment model in the dense two-phase flow is developed,the influence of particle volumetric fraction is taken into account.Compared the result of this algorithm with that neglecting the effect of particle concentration,it is found that whether the influence of particle volumetric fraction is considered or not,the flow parameters,such as the particle concentration profile and the mean velocity,are affected to a differed extent.The present algorithm leads to a better prediction.