| 混合单元(P_3/P_2)在后向台阶流数值计算中的应用 |
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| 引用本文： | 李军利.混合单元(P_3/P_2)在后向台阶流数值计算中的应用[J].内蒙古工业大学学报,2010(1). |
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| 作者姓名： | 李军利 |
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| 作者单位： | 内蒙古工业大学能动学院; |
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| 基金项目： | 内蒙古自然科学基金(200607010701) |
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| 摘 要： | 对基于三角形单元的速度插值次数为三次和压力插值次数为二次的混合单元(P3/P2元)做了数值检验,使用的算例为后向台阶整个二维流动.计算表明,该单元计算稳定,有很好的数值精度,计算中还发现了以往研究中未曾揭示的流动现象——台阶后的再附着点与局部的压力最高点并不重合.
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| 关 键 词： | 高次单元 有限元 不可压缩流体 后向台阶流 |
THE APPLICATION OF(P_3/P_2) ELEMENT IN COMPUTATIONAL CALCULATION OF BACKWARD-FACING STEP FLUID FLOW |
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| LI Jun-li.THE APPLICATION OF(P_3/P_2) ELEMENT IN COMPUTATIONAL CALCULATION OF BACKWARD-FACING STEP FLUID FLOW[J].Journal of Inner Mongolia Polytechnic University(Social Sciences Edition),2010(1). |
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| Authors: | LI Jun-li |
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| Institution: | School of Power Engineering/a>;Inner Mongolia University of Technology/a>;Hohhot 010051/a>;China |
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| Abstract: | In this paper,the finite element technique is introduced which,for simulating incompressible flows,uses continuous piecewise cubic polynomials to approximate the velocity and cintinuous piecewise quadratic polynomials to approximate the pressure inside each p3/p2 triangular element.The newly developed code has been proved to be valid by its application to the two-dimensional flow over a backward-facing step.The numerical results have shown excellent agreement with experimental results,as well as with those ... |
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| Keywords: | p3/p2 element finite element incompressible flows |
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