| 背向阶梯流谱元法计算中的Orlanski型出口边界条件 |
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| 引用本文： | 许传炬. 背向阶梯流谱元法计算中的Orlanski型出口边界条件[J]. 厦门大学学报(自然科学版), 1999, 38(2): 179-185 |
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| 作者姓名： | 许传炬 |
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| 作者单位： | 厦门大学数学系,厦门,361005 |
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| 摘 要： | 讨论谱元法计算中的各种出口边界条件及其对数值模拟的影响．引入Ｏｒｌａｎｓｋｉ型出口边界条件在谱元法计算中的实现方法，并介绍其在二维背向阶梯流数值模拟中的应用．数值结果显示，该型出口边界条件比通常的Ｄｉｒｉｃｈｌｅｔ型和Ｎｅｕｍａｎｎ型边界条件对背向阶梯流计算结果的干扰更小．
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| 关 键 词： | 背向阶梯流，出口边界条件，谱元法 |
Orlanski-type Open Boundary Condition on Numerical Simulation of Backward-Facing Step Flow via Spectral Element Methods |
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| Xu Chuanju. Orlanski-type Open Boundary Condition on Numerical Simulation of Backward-Facing Step Flow via Spectral Element Methods[J]. Journal of Xiamen University(Natural Science), 1999, 38(2): 179-185 |
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| Authors: | Xu Chuanju |
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| Abstract: | The purpose of this paper is to compare the effect of different open boundary conditions (OBCs) based upon simulation results of backward facing step flow. An Orlanski type OBCs is introduced in the context of spectral element method, for which a new treatment technique is detailed.The computation are carried out for Re=200.Numerical results show that the Orlanski type OBCs have better behavior as Dirichlet and compared to the other classic OBCs, such as Dirichlet and Neumann type OBCs. |
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| Keywords: | Backword facing step flow Open boundary conditions Spectral element methods |
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