| TRANSIENT EFFECT OF A BOGER FLUID FLOWING AROUND A CONFINED CYLINDER |
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| 引用本文： | Xian-feng Li,Huai-tian Bu,De-lu Zhao State Key Laboratory of Polymer Physics and Chemistry Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China. TRANSIENT EFFECT OF A BOGER FLUID FLOWING AROUND A CONFINED CYLINDER[J]. 高分子科学, 2001, 0(4): 377-384 |
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| 作者姓名： | Xian-feng Li Huai-tian Bu De-lu Zhao State Key Laboratory of Polymer Physics and Chemistry Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China |
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| 作者单位： | Xian-feng Li;Huai-tian Bu;De-lu Zhao State Key Laboratory of Polymer Physics and Chemistry Center for Molecular Science，Institute of Chemistry，Chinese Academy of Sciences，Beijing 100080，China |
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| 基金项目： | This work is supported by the National Natural Science Foundation of China (No. 29634030) and subsidized by the Special Funds for Major State Basic Research Projects (G1999064800). |
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| 摘 要： | This paper is concerned with the numerical simulation of the transient effect of an inertialess Boger flow past aconfined circular cylinder and the comparison of predictions with particle image velocimetry (PIV) measurements given byShiang et al., Dynamic simulation based on the Oldroyd-B constitutive model was carried out using a Lagrangian-Eulerianalgorithm. The evolution of velocity field was obtained for the flow at two Deborah (De) numbers, i.e. De = 1.2 and 3.0. Atlow De, the flow reached steady state rapidly, and showed a symmetric flow regime. However, at high De, the time requiredto reach steady flow behind the cylinder increased significantly, and the distribution of the velocity field appears to beasymmetric with respect to the stagnation line. Fairly good agreement between the numerical results and the experimentalobservations is reported. It can be concluded that both the experimental measurements and the present simulations indicatethat the elasticity of the polymeric flow strongly affect the flow regime of viscoelastic flow around a confined cylinder.
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| 收稿时间： | 2000-07-28 |
| 修稿时间： | 2000-09-06 |
TRANSIENT EFFECT OF A BOGER FLUID FLOWING AROUND A CONFINED CYLINDER* |
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| Xian-feng Li,Huai-tian Bu,De-lu Zhao. TRANSIENT EFFECT OF A BOGER FLUID FLOWING AROUND A CONFINED CYLINDER*[J]. Chinese Journal of Polymer Science, 2001, 0(4): 377-384 |
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| Authors: | Xian-feng Li Huai-tian Bu De-lu Zhao |
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| Affiliation: | State Key Laboratory of Polymer Physics and Chemistry Center for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100080; China |
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| Abstract: | This paper is concerned with the numerical simulation of the transient effect of an inertialess Boger flow past aconfined circular cylinder and the comparison of predictions with particle image velocimetry (PIV) measurements given byShiang et al., Dynamic simulation based on the Oldroyd-B constitutive model was carried out using a Lagrangian-Eulerianalgorithm. The evolution of velocity field was obtained for the flow at two Deborah (De) numbers, i.e. De = 1.2 and 3.0. Atlow De, the flow reached steady state rapidly, and showed a symmetric flow regime. However, at high De, the time requiredto reach steady flow behind the cylinder increased significantly, and the distribution of the velocity field appears to beasymmetric with respect to the stagnation line. Fairly good agreement between the numerical results and the experimentalobservations is reported. It can be concluded that both the experimental measurements and the present simulations indicatethat the elasticity of the polymeric flow strongly affect the flow regime of viscoelastic flow around a confined cylinder. |
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| Keywords: | Transient effect Flow around a cylinder Lagrangian-Eulerian algorithm Oldroyd-B model |
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