THE LAGRANGIAN-EULERIAN METHOD:SOLUTIONS FOR FLOW AROUND A CYLINDER IN A PLANAR CHANNEL

LI Xianfeng; YUAN Xuefeng; BU Huaitian; ZHAO Delu

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THE LAGRANGIAN-EULERIAN METHOD:SOLUTIONS FOR FLOW AROUND A CYLINDER IN A PLANAR CHANNEL

Research Article | 更新时间：2021-03-19

- THE LAGRANGIAN-EULERIAN METHOD:SOLUTIONS FOR FLOW AROUND A CYLINDER IN A PLANAR CHANNEL
- Acta Polymerica Sinica Issue 5, Pages: 521-525(2000)
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- Published：20 October 2000，
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LI Xianfeng, YUAN Xuefeng, BU Huaitian, ZHAO Delu. THE LAGRANGIAN-EULERIAN METHOD:SOLUTIONS FOR FLOW AROUND A CYLINDER IN A PLANAR CHANNEL. [J]. Acta Polymerica Sinica (5):521-525(2000)
DOI：

LI Xianfeng, YUAN Xuefeng, BU Huaitian, ZHAO Delu. THE LAGRANGIAN-EULERIAN METHOD:SOLUTIONS FOR FLOW AROUND A CYLINDER IN A PLANAR CHANNEL. [J]. Acta Polymerica Sinica (5):521-525(2000) DOI：

摘要

为验证拉格朗日-欧拉方法的准确性

对高分子溶液的 2∶1绕圆柱流动问题进行了数值模拟

采用单松弛时间的PhanThien Tanner本构方程

得到PIB/C14溶液在De=0.93的绕流计算结果

同Baaijens等所做的绕流实验中的稳态流场物理量的测量结果进行了比较

在定量上取得较好的一致性 .证明拉格朗日-欧拉方法能够在定性上乃至在定量上准确地预报高分子复杂流体的流动行为

在描述真实的物理过程时是合理、准确的.

Abstract

The Lagrangian-Eulerian algorithm was used for simulating flow past a confined cylinder with 1∶2 diameter/wall ratio.The one-mode Phan-Thien and Tanner(PTT) constitutive model was used in the present calculation.Profiles of both velocity and stresses are obtained at different sections of the steady flow

and compared with laser Doppler velocimetry and flow-induced birefringence data given by Baaijens et al. for a polyisobutylene/tetradecane(PIB/C14) contraction flow at Deborah number De =0.93.Overall

the simulation has reproduced the experimental results is fairly well. In addition

the dimensionless drag on the cylinder is reported to be a monotonically decreasing function of the Deborah numer

and agrees well with the numerical results of Dou and Phan-Thien.

关键词

拉格朗日-欧拉方法平面绕流

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