Influence of Wall Microscale Topography on Ultrathin Liquid Film Flow

doi:10.7652/xjtuxb201307008

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Influence of Wall Microscale Topography on Ultrathin Liquid Film Flow

更新时间：2025-07-09

- Influence of Wall Microscale Topography on Ultrathin Liquid Film Flow
- Vol. 47, Issue 7, Pages: 40-46(2013)
- 作者机构：
  
  华北电力大学电站设备状态监测与控制教育部重点实验室,河北,保定,071003
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201307008
  CLC： O363;TQ021
- Online First：10 July 2013，
  
  Published：2013
- 稿件说明：
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Influence of Wall Microscale Topography on Ultrathin Liquid Film Flow[J]. 2013, 47(7): 40-46.
DOI：

Influence of Wall Microscale Topography on Ultrathin Liquid Film Flow[J]. 2013, 47(7): 40-46. DOI： 10.7652/xjtuxb201307008.

摘要

针对非平整基底表面上的超薄液膜流动

采用润滑理论推导出液膜厚度演化方程

并利用PDECOL程序进行了数值求解

分析了不同基底表面液膜轮廓的变化特征及基底结构参数和重力对液膜流动的影响。研究表明:微尺度基底的不平整特征将引起液体局部压力增加或减小

形成隆起或凹陷

使液膜表面发生变形; 台阶、V字形和矩形凹槽等基底的深度增加或斜度减小具有增强液膜表面变形的作用

基底宽度仅在小范围内增加具有放大液膜表面变形的作用; 波状基底高度增大具有增强液膜隆起高度、减弱液膜凹陷深度的作用

波数的作用与之相反; 重力会抑制液膜隆起和凹陷的发生。

Abstract

The lubrication theory was used to derive the evolution equation of thin liquid film thickness. The variations of ultrathin liquid film thickness on different topography surfaces

and the influence of topography structure and gravity were analyzed on the basis of the numerical simulation with the PDECOL code. The results show that microscale topography can cause liquid local pressure to increase or decrease

thus forming the ridge or depression and then leading the free surface of the ultrathin liquid film to be deformed. The increase in topography depth and the decrease in steepness can enhance the deformation of the ultrathin liquid film. The increase in topography width only in a small range can yield the amplification of the ultrathin liquid film deformation. The increase in corrugated topography height can enhance the ridge and mitigate the depression of the liquid film while the wave number of topography has an adverse effect. In addition

gravity can inhibit the formation of the ridge and depression of the ultrathin liquid film.

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references

马爱香, 魏进家, 袁敏哲, 等. 方柱微结构表面上FC-72的流动沸腾强化换热实验研究 [J]. 工程热物理学报, 2009, 30(8): 1324-1326.

MA Aixiang, WEI Jinjia, YUAN Minzhe, et al. Enhanced flow boiling heat transfer of FC-72 on micro-pin-finned silicon surfaces [J]. Journal of Engineering Thermophysics, 2009, 30(8): 1324-1326.

KALLIADASIS S, BIELARZ C, HOMSY G M. Steady free-surface thin film flows over topography [J]. Physics of Fluids, 2000, 12(8): 1889-1898

张程宾, 陈永平, 施明恒, 等. 表面粗糙度的分形特征及其对微通道内层流流动的影响 [J]. 物理学报, 2009, 58(10): 7050-7056.

ZHANG Chengbin, CHEN Yongping, SHI Ming- heng, et al. Fractal characteristics of surface roughness and its effect on laminar flow in microchannels [J]. Acta Physica Sinica, 2009, 58(10): 7050-7056.

王玮, 李志信, 过增元. 粗糙表面对微尺度流动影响的数值分析 [J]. 工程热物理学报, 2003, 24(1): 85-87.

WANG Wei, LI Zhixin, GUO Zengyuan. Numerical simulation of rough surface effects on microscale fluid flow [J]. Journal of Engineering Thermophysics, 2003, 24(1): 85-87.

GERBIG Y B, PHANI A R, HAEFKE H. Influence of nanoscale topography on the hydrophobicity of fluoro-based polymer thin films [J]. Applied Surface Science, 2005, 242(3/4): 251-255.

STILLWAGON L E, LARSON R G. Leveling of thin films over uneven substrates during spin coating [J]. Physics of Fluids, 1990, 2(11): 1937-1944.

SAPRYKIN S, KOOPMANS R J, KALLIADASIS S. Free-surface thin-film flows over topography: influence of inertia and viscoelasticity [J]. Journal of Fluid Mechanics, 2007, 578: 271-293.

TATIANA G R, ALEXANDER A, PETER S. Effect of the microscale wall topography on the thermal capillary convection within a heated liquid film [J]. Experimental Thermal and Fluid Science, 2005, 29(7): 765-772.

TSELUIKO D, BLYTH M G, PAPAGEORGIOU D T. Electrified film flow over step topography at zero Reynolds number: an analytical and computational study [J]. Journal of Engineering Mathematics, 2011, 69(2/3): 169-183.

朴明日, 胡国辉. 壁面结构对非定常薄膜流动表面波特性的影响 [J]. 计算物理, 2011, 28(6): 843-852.

PAK Myong-Il, HU Guohui. Influences of wall topography on unsteady free surface waves in film flow [J]. Chinese Journal of Computational Physics, 2011, 28(6): 843-852.

KALLIADASIS S, HOMSY G. Stability of free-surface thin-film flows over topography [J]. Journal of Fluid Mechanics, 2001, 448: 387-410.

DAVIS J M, TROIAN S M. Generalized linear stability of noninertial coating flows over topographical features [J]. Physics of Fluids, 2005, 17(7): 072103.

SCHWARTZ L W, WEIDNER D E. Modeling of coating flows on curved surfaces [J]. Journal of Engineering Mathematics, 1995, 29(1): 91-103.

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