| Viscous liquid films on a porous vertical cylinder: Dynamics and stability |
| Ding ZJ(丁子敬) ; Wong TN; Liu R(刘荣); Liu QS(刘秋生); Wong, TN (reprint author), Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore.
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| 发表期刊 | PHYSICS OF FLUIDS
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| 2013-06-01
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| 卷号 | 25期号:6页码:064101-18 |
| ISSN | 1070-6631
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| 摘要 | In this paper, liquid films flowing down a porous vertical cylinder were investigated by an integral boundary layer model. Linear stability and nonlinear evolution were studied. Linear stability results of the integral boundary layer model were in good agreement with the linearized Navier-Stokes equations which indicated that the permeability of the porous medium enhanced the instability of the flow system. The growth rate and cut-off wave number increased with increasing the permeability and the Reynolds number. Linear stability analysis showed that the system was more unstable for a larger Reynolds number Re. Nonlinear studies showed that, for a very small Re, the film evolved with time while a saturated state was not observed. In addition, it was observed that the film ruptured when the permeability parameter beta > 0, and the rupture time decreased with increasing beta. However, for a moderate Reynolds number, a small finite harmonic disturbance evolved to a saturated traveling wave. Further investigation was conducted on the droplet-like wave solution. Results showed that the wave speed increased as the permeability parameter increased. |
| 关键词 | Boundary Layers
Cylinders (Shapes)
Liquid Films
Navier Stokes Equations
Porous Materials
Reynolds Number
Boundary Layer Models
Cut-off Wave Numbers
Harmonic Disturbances
Moderate Reynolds Numbers
Nonlinear Evolutions
Permeability Of The Porous Mediums
Vertical Cylinders
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| 学科领域 | 流体力学
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| URL | 查看原文
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000321272600021
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| 项目资助者 | National Natural Science Foundation of China [11102211]
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| 课题组名称 | NML流动稳定性与复杂流动
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| 论文分区 | 一类/力学重要期刊
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/47360
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| 专题 | 微重力重点实验室
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| 通讯作者 | Wong, TN (reprint author), Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore. |
推荐引用方式
GB/T 7714 |
Ding ZJ,Wong TN,Liu R,et al. Viscous liquid films on a porous vertical cylinder: Dynamics and stability[J]. PHYSICS OF FLUIDS,2013,25,6,:064101-18.
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| APA |
丁子敬,Wong TN,刘荣,刘秋生,&Wong, TN .(2013).Viscous liquid films on a porous vertical cylinder: Dynamics and stability.PHYSICS OF FLUIDS,25(6),064101-18.
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| MLA |
丁子敬,et al."Viscous liquid films on a porous vertical cylinder: Dynamics and stability".PHYSICS OF FLUIDS 25.6(2013):064101-18.
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