| 两相湍流色噪声扩维法PDF模型及数值模拟 |
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| 引用本文： | 李昭祥,徐江荣,杨忠华.两相湍流色噪声扩维法PDF模型及数值模拟[J].计算物理,2010,27(1). |
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| 作者姓名： | 李昭祥 徐江荣 杨忠华 |
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| 作者单位： | 1. 上海师范大学数理学院科学计算上海高校重点实验室,上海,200234
2. 杭州电子科技大学理学院,浙江,杭州,310018 |
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| 基金项目： | 国家自然科学基金，上海重点学科建设项目，浙江省自然科学基金，上海师范大学科研项目，上海市教委创新项目 |
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| 摘 要： | 由颗粒运动的朗之万方程出发,对流体脉动速度采用扩维方法,得到两个不同层次的PDF输运方程.通过对颗粒运动方程求解和高斯分布假设,解决 PDF 方程的封闭问题,获得颗粒二阶矩模型,然后将颗粒应力方程简化成代数方程,建立代数应力模型.将对流扩散方程的有限分析法运用到求解两相流模型中,对壁面两相射流进行数值模拟,对比分析数值结果与实验结果.
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| 关 键 词： | 湍流 扩维法 两相流 数值模拟 色噪声 二阶矩模型 |
A Two-phase Turbulence PDF Model with Expanding Dimension Method of Colored Noise and Simulation of Wall-jet-flows |
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| LI Zhaoxiang,XU Jiangrong,YANG Zhonghua.A Two-phase Turbulence PDF Model with Expanding Dimension Method of Colored Noise and Simulation of Wall-jet-flows[J].Chinese Journal of Computational Physics,2010,27(1). |
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| Authors: | LI Zhaoxiang XU Jiangrong YANG Zhonghua |
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| Abstract: | With Langevin equation of particle motion,PDF equations in two levels are obtained in which the fluid fluctuation velocity is expanded in dimension and one-dimensional colored noise is transformed into two-dimensional white noise.They are two-phase PDF transport equation of turbulence and particle-phase PDF transport equation.With particle motion equations and assumption of Gaussian distribution,a closure problem of PDF equation is solved and a second-order-moment model is obtained.It is simplified into an algebra stress modelASM].A finite analytic numerical method for convective diffusion equation is applied to solve the two-order moment model of two-phase flows.A wall-jet-flow loaded with solid particles is studied in the ASM by finite analytic numerical method.Numerical results are compared with experimental results. |
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| Keywords: | turbulence method of expanded dimension two-phase flow numerical simulation colored noise second order moment model |
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