基于Lagrange方法封闭的两相湍流场方程模型
发布时间：2018-08-06 13:44
【摘要】：两相湍流场方程模型采用基于Euler方法的一阶矩方程,而二阶矩方程由Lagrange方法得到,新模型的封闭不需要附加其它假设.首先基于概率密度函数给出颗粒运动的连续方程和动量方程,其次由基于平均Langevin方程的Lagrange模型推导得到颗粒二阶矩方程,最终获得封闭的二阶矩模型.将新模型用于气固两相壁面射流的数值模拟,结果表明新模型合理有效.
[Abstract]:The two-phase turbulent field equation model adopts the first-order moment equation based on the Euler method, while the second-order moment equation is obtained by the Lagrange method. The closure of the new model does not require any other assumptions. Firstly, the continuous equation and momentum equation of particle motion are given based on the probability density function. Secondly, the second moment equation of particles is derived from the Lagrange model based on the average Langevin equation, and the closed second moment model is obtained. The new model is applied to the numerical simulation of gas-solid two-phase wall jet. The results show that the new model is reasonable and effective.
【作者单位】： 南京理工大学能源与动力工程学院;杭州电子科技大学能源研究所;
【基金】：国家自然科学基金(51176044) 浙江省自然科学基金(Y1110620)资助项目
【分类号】：O357.5
，
本文编号：2167914
[Abstract]:The two-phase turbulent field equation model adopts the first-order moment equation based on the Euler method, while the second-order moment equation is obtained by the Lagrange method. The closure of the new model does not require any other assumptions. Firstly, the continuous equation and momentum equation of particle motion are given based on the probability density function. Secondly, the second moment equation of particles is derived from the Lagrange model based on the average Langevin equation, and the closed second moment model is obtained. The new model is applied to the numerical simulation of gas-solid two-phase wall jet. The results show that the new model is reasonable and effective.
【作者单位】： 南京理工大学能源与动力工程学院;杭州电子科技大学能源研究所;
【基金】：国家自然科学基金(51176044) 浙江省自然科学基金(Y1110620)资助项目
【分类号】：O357.5
，
本文编号：2167914
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