| 两相湍流统一色噪声法概率密度函数模型 |
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| 引用本文： | 王路,徐江荣.两相湍流统一色噪声法概率密度函数模型[J].物理学报,2015,64(5):54704-054704. |
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| 作者姓名： | 王路 徐江荣 |
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| 作者单位： | 1. 南京理工大学能源与动力工程学院, 南京 210094;2. 杭州电子科技大学能源研究所, 杭州 310018 |
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| 基金项目： | 国家自然科学基金(批准号: 51176044)和浙江省自然科学基金(批准号: Y1110620)资助的课题. |
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| 摘 要： | 统一色噪声近似方法对简单一维色噪声问题研究较为充分, 本文将统一色噪声法应用到高度复杂的多维气固两相湍流系统之中.首先从颗粒运动Langevin方程出发, 利用统一色噪声法获得两相湍流Fokker-Planck方程, 然后以此为基础建立颗粒轨道两阶矩模型.文中建立的新模型成功应用于后台阶两相湍流流场的数值模拟, 预报合理正确.研究表明, 对于多维两相湍流系统, 统一色噪声法仍然行之有效.
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| 关 键 词： | 统一色噪声近似 概率密度函数模型 两阶矩模型 数值模拟 |
| 收稿时间： | 2014-07-25 |
A two-phase turbulence probability density function model in unified colored-noise approximation |
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| Wang Lu,Xu Jiang-Rong.A two-phase turbulence probability density function model in unified colored-noise approximation[J].Acta Physica Sinica,2015,64(5):54704-054704. |
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| Authors: | Wang Lu Xu Jiang-Rong |
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| Institution: | 1. School of Energy and Power Engineering, Nanjing University of Sicence and Technology, Nanjing 210094, China;2. Insititute of Energy Science and Engineering, Hangzhou Dianzi University, Hangzhou 310018, China |
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| Abstract: | A unified colored-noise approximation (UCNA) method has been widely used to solve the simple one-dimensional problem, and this paper attempts to extend this method to multi-dimensional systems. Firstly, a Fokker-Planck equation is obtained by UCNA method based on the Langevin equation for particle motion, then a two-order moment trajectory model is established on this basis. The new model can be successfully used to predict the backward-facing step two-phase flow, and the simulation results agree well with the measurements. This study shows that the UCNA method is still effective in dealing with multi-dimensional two-phase turbulent systems. |
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| Keywords: | unified colored-noise approximation probability density function model two-order moment model numerical simulation |
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