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求解不可压缩流动的分步有限元格式 被引量:5

Fractional step finite element formulation for solving incompressible flows
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摘要 提出求解不可压缩 Navier- Stokes方程的分步有限元格式 ,该格式没有高阶微分项产生、程序编制简单 ,适用于非线性的多维复杂流动。应用该方法实际模拟了二维圆柱绕流的旋涡形成与脱落过程 ,得出了不同 Re情况下圆柱绕流的流速分布。计算得到的不同 Re下的旋涡脱落频率(Strouhal数 ) A fractional step finite element scheme is proposed for unsteady incompressible flows. Since no higher order terms are introduced in the presented computation, this method is suitable for nonlinear multi dimensional problems. The unsteady flow around a two dimensional circular cylinder was analyzed to predict the flow patterns for different Reynolds numbers. The predicted Strouhal number for vortex shedding is in good agreement with previous result.
出处 《清华大学学报(自然科学版)》 EI CAS CSCD 北大核心 2002年第2期278-280,共3页 Journal of Tsinghua University(Science and Technology)
基金 国家自然科学基金资助项目 ( 5 99790 13) 四川大学高速水力学国家重点实验室访问学者资助项目
关键词 分步有限元法 不可压缩流动 圆柱绕流 流速分布 旋涡脱落频率 流体力学 fractional step finite element method incompressible flow flow around cylinders
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