三维水动力学模型高精度差分格式和解法研究 |
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引用本文: | 谢伟松,陶建华. 三维水动力学模型高精度差分格式和解法研究[J]. 天津大学学报(自然科学与工程技术版), 2003, 36(5): 590-594 |
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作者姓名: | 谢伟松 陶建华 |
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作者单位: | [1]天津大学理学院,天津300072 [2]天津大学机械工程学院,天津300072 |
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基金项目: | 南开大学天津大学刘徽应用数学中心基金资助项目. |
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摘 要: | ![]() 采用高精度差分格式对三维水动力学问题的时均化Navier-Stokes方程进行了数值模拟,进而采用广义共轭剩余法(GCR方法)求解压力泊松方程,并采用显式三级二阶Runge-Kutts格式模拟了时间步进过程。傅立叶分析表明,文中所采用的三阶迎风紧致差分格式具有较高的精度,数值实验进一步验证了上述数值模型的准确性和有效性。
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关 键 词: | 三维水动力学模型 高精度差分格式 时均化Navier-Stokes方程 数值模拟 广义共轭剩余法 |
文章编号: | 0493-2137(2003)05-0590-05 |
修稿时间: | 2002-08-08 |
Study of High Accuracy Difference Scheme and Solution Method of a 3-D Hydrodynamic Model |
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Abstract: | ![]() In this paper, the time averaged Navi er -Stokes equations for 3-D hydrodynamic problems are solved by the high accurac y difference scheme. The accuracy of several difference schemes is analyzed by F ourier analysis.The three-order up-winding compact scheme applied in this pape r is proved to have relatively high accuracy. Furthermore, General conjugate res idue method(GCR) is applied to solve the pressure Poisson equation, and a three steps and second order Runge-Kutta scheme is used to simulate the time developm ent. The numerical experiment results have verified that the model is valid. |
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Keywords: | high accuracy scheme up-winding compact scheme Navier-Stokes equation general conjugate residue method |
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